HomeMy WebLinkAboutOrdinance 5512 ORDINANCE NO. 5512
AN ORDINANCE TO AMEND §173.08 ARKANSAS ENERGY CODE OF
THE BUILDING REGULATIONS CHAPTER OF THE U.D.C. TO ADOPT
THE 2009 INTERNATIONAL ENERGY CONSERVATION CODE, FOR
RESIDENTIAL STRUCTURES, WITH AMENDMENTS HEREIN.
WHEREAS, Fayetteville customers spend over $50 million annually for electricity and
natural gas services; and
WHEREAS, more efficient buildings can conserve energy, reduce stress on our
electricity grid and natural gas supplies while saving money and resources for our citizens; and
WHEREAS, improved building codes emphasizing energy conservation can reduce
future energy consumption and the costs associated with energy production; and
WHEREAS, the existing State adopted and amended 2003 International Energy
Conservation Code is inferior in comparison with the 2009 International Energy Conservation
Code; and
WHEREAS, pursuant to A.C.A §14-55-206 and 207, the City of Fayetteville has
published notice in the Northwest Arkansas Times that the City Council will consider enacting
an ordinance to adopt and require all new residential construction and renovations to comply
with the 2009 International Energy Conservation Code, three copies of which are available for
public inspection and review in the Fayetteville City Clerk's Office.
NOW, THEREFORE, BE IT ORDAINED BY THE CITY COUNCIL OF THE
CITY OF FAYETTEVILLE,ARKANSAS:
Section 1. That the City Council of the City of Fayetteville, Arkansas hereby repeals
§173.08 Arkansas Energy Code of the Unified Development Code and enacts a replacement
§173.08 Energy Conservation Code as shown below:
"§173.08 Energy Conservation Code
(A)Commercial. The Arkansas Energy Code, its Rules and Regulations as adopted and
promulgated by the Arkansas Energy Office, and as from time to time
Page 2
Ordinance No. 5512
hereafter may be amended, is hereby adopted by reference pursuant to A.C.A. § 14-
55-206 and § 14-55-207.
(B)Residential. The 2009 International Energy Conservation Code(IECC) is hereby
adopted by reference for all new residential structures with the exception of§107
Fees and §109 Board of Appeals.
(1) New residential construction.
The 2009 IECC is hereby amended by adding a provision requiring a Home
Energy Rating System (HERS) Index rating for new residential construction. The
City of Fayetteville requires that all new residential construction have a Home
Energy Rating System (HERS) Index rating completed by an independent
RESNET certified home energy rater, or equivalent, prior to the issuance of a
Certificate of Occupancy. Residential developments that utilize the exact same
floor plan multiple times are required to have a HERS Index rating completed on
a minimum of 20% of the residential units.
(2) Sticker.
A sticker provided by the city shall be posted in a very visible location near the
front entrance to the residential structure indicating the estimated monthly utility
cost as derived from the HERS Index rating until the structure is sold, or for at
least 90 days, whichever is less.
(3) Additions, Alteration and renovations.
All additions, alterations and renovations to existing residential structures shall
comply with the standards of the 2009 IECC, but shall not be required to provide
a HERS Index rating or post a sticker. Where it is shown to be impractical to meet
the 2009 IECC, the Building Official may permit additions to comply with the
Arkansas Energy Code, its Rules and Regulations as adopted and promulgated by
the Arkansas Energy Office, and as from time to time hereafter may be amended."
(4) Repairs.
All repairs to existing residential structures and mechanical systems need only be
constructed to at least the same energy conservation standard as the damaged
structure or mechanical system which needed repair unless a higher standard is
required by the Arkansas Energy Code.
(5) Fees.
Page 3
Ordinance No. 5512
§107 Fees of the IECC is removed to reflect that only the City Council can set
required fees and any refund policy,the"code official" cannot set fees nor a
refund policy. All fees shall be as prescribed in the Unified Development Code.
(6) Appeals.
§109 Board of Appeals shall be removed from the IECC and have no force or
application. Appeals of the Building Official's interpretation of this International
Energy Conservation Code shall be heard by the existing Board of Construction
Appeals and no new Board of Appeals for interpreting the International Energy
Conservation Code shall be created by this Code.
Section 2. That in order to adequately prepare the residential construction industry for the
2009 International Energy Conservation Code (IECC) and the related new testing requirements,
the effective date of the new code shall be implemented in stages as follows:
(1) All provisions of the adopted 2009 IECC, as amended, shall become effective on
September 03, 2012, with the exception that a Certificate of Occupancy may be
issued even if a residential structure does not pass the air sealing/infiltration or
duct sealing testing requirements.
(2) The HERS Index rating and associated sticker requirements shall become
effective on September 03, 2012.
(3) All provisions of the adopted 2009 IECC, as amended, shall be effective on
March 06, 2013.
PASSED and APPROVED this 17''day of July, 2012.
APPROVED: ATTEST:
)3y:.(
: l By: l/0/i ttriivt� r� �lyu��/l
I HELD O AN, Mayor SONDRA E. SMITH, City Clerk/Treasurer
°�G4�,...•E4SG.
;FAYETTEVILLE•
.9 S
..
AGENDA REQUEST FORM
FOR: COUNCIL MEETING OF June 05, 2012
FROM: Mayor Lioneld Jordan
Council Member Matthew Petty
Council Member Sarah Lewis
ORDINANCE TITLE AND SUBJECT:
ADM 11-3655: Residential Energy Code
An ordinance to amend the Residential Energy Code, adopting the 2009 IECC Energy Code for
Residential Construction, with the addition of a Home Energy Rating System (HERS)
requirement.
APPROVED FOR AGENDA:
ayor Lio ordan Date
� Z � 2vlz
Cout cil Mem Matthew Pe Date
2--
Council Member Sarah Lewis Date
Packet Prepared by:
Jeremy Nte Date
Director of Development Services
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a e v1 le THE CITY OF FAYETTEVILLE,ARKANSAS
01 y DEPARTMENT CORRESPONDENCE
ARKANSAS
CITY COUNCIL AGENDA MEMO
To: Mayor Lioneld Jordan
City Council
CC: Don Marr,Chief of Staff
Kit Williams,City Attorney
Jeremy Pate, Development Services Director
David Molaschi, Building Official
From: Leif Olson, Associate Planner
Date: May 17,2012
Subject: ADM 11-3655 Residential Building Codes
PURPOSE
In July of 2011, Mayor Lioneld Jordan and Alderman Matthew Petty co-sponsored Resolution 117-11 to have city staff
examine City building codes and recommend amendments to further promote sustainable practices and energy
conservation for City Council consideration.
BACKGROUND
The City of Fayetteville, along with the rest of the State,has consistently followed the State of Arkansas' lead on building
code adoption to regulate construction practices in the commercial and residential sectors. Currently, the State requires
compliance with an amended 2003 International Energy Conservation Code (IECC). Since the State's adoption of the
2003 IECC there have been three IECC updates (2006, 2009 and 2012). Due to Arkansas' rural nature the State Building
Codes are not regularly updated to the newer standards, primarily because rural areas may not have the resources to
adequately enforce these codes. Unfortunately, that leaves the more urban areas of the State regulating building practices
with the older, less energy efficient standards unless a municipality chooses to adopt more stringent standards. In addition,
Northwest Arkansas is unique our counterparts in the central, south and east parts of the state in that we are situated in a
different climate zone. Many peer urban areas in the climate zone in which Fayetteville is situated (Springfield, Joplin,
Columbia, MO; Lawrence, Manhattan, KS; Bowling Green, KY; Nashville, TN) have adopted new energy codes for
building construction.
In December 2007, the Mayor's Ad-Hoc Committee on Energy Efficient Construction was assembled with the goal of
improving energy efficiency. The Committee quickly narrowed its focus on new residential construction and created the
voluntary Residential Energy Efficiency Program (BEEP) and the Fayetteville Energy Scorecard. Unfortunately, the
voluntary REEP program has not resulted in the widespread adoption of green building practices that the City had hoped
for in the 4 years since it was adopted.
On July 5, 2011 the City Council passed Resolution 117-11 directing City Staff to examine Fayetteville's current building
codes and recommend possible changes to encourage energy efficiency improvements for City Council consideration. A
Residential Building Code Task Force was formed comprised of local home builders, architects and energy performance
consultants tasked with researching,modeling and developing a recommendation for the adoption of energy code changes.
Included in the staff report is the research and energy modeling analysis conducted by the Residential Building Code Task
THE CITY OF FAYETTEVILLE,ARKANSAS
Force as well as a report prepared by the U.S. Department of Energy titled "Impacts of the 2009 IECC on Residential
Buildings in Arkansas". Together these analyses paint a clear picture of the improvements that can be made upon the
existing energy codes for residential construction,and what the cost and benefit will be to the consumer.
RECOMMENDATION
After completing substantial research and home energy modeling, the Residential Building Code Task Force and City
staff recommends adopting the 2009 IECC for residential construction with an additional requirement for a Home Energy
Rating (HERS) for all new residential structures. After consulting with Home Builders Association membership
representatives on multiple occasions,staff is also recommending a delayed implementation date for the HERS and sticker
requirement, as this is a new step in the home construction process for some builders.
Included in the staff report are the following resources:
1) Resolution 117-11, adopted by the City Council
2) Committee Summary Analysis of Residential Energy Codes
3) Cost/Benefit Analysis of Residential Energy Codes (3 pages)
4) Dept. of Energy Report,"Impacts of the 2009 IECC for Residential Buildings at State Level"
5) 2009 IECC,Chapter l 1 Residential Energy Efficiency
BUDGETIMPACT
None.
THE CITY OF FAYETTEVILLE,ARKANSAS
Marked-Up Version
The following language is removed:
173,09 Arkangas Energy Code
b
Hted
by referaftee pttrsttant to A.G.A. § 14 55 206 and § 14 55 2AW.
The BuildiHg Safety Division is autherized to design, appFaye and may laten- amend an Finer" Effisionley
The following language is added.
173.08 Energy Efficiency Code
(A) Commercial. The Arkansas Energy Code, its Rules and Regulations as adopted and promulgated by the
Arkansas Energy Office, and as may from time to time hereafter may be amended, is hereby adopted by
reference pursuant to A.C.A. § 14-55-206 and § 14-55-207.
(B)Residential. The 2009 International Energy Efficiency Code(IECC) is hereby adopted by reference for all
new residential structures.
(1) The 2009 IECC is hereby amended by adding a provision requiring a Home Energy Rating(HERS) for
new home construction. The City of Fayetteville requires that all new residential construction have a
Home Energy Rating (HERS)completed by an independent RESNET certified home energy rater, or
equivalent, prior to the issuance of a Certificate of Occupancy. Residential developments that utilize the
exact same floor plan multiple times are required to have a HERS completed on a minimum of 20%of
the residential units.
(2) A sticker shall be posted in a very prominent location near the front door showing the estimated monthly
utility cost until the home is sold.
(3) All additions, alterations, renovations or repairs to existing residential structures shall comply with the
standards of the 2009 IECC, but shall not be required to provide a HERS or post a sticker. Where it is
shown to be impractical to meet the 2009 IECC, the Building Official may consider permitting
additions, alterations, renovations or repairs in compliance with the Arkansas Energy Code, its Rules
and Regulations as adopted and promulgated by the Arkansas Energy Office, and as may from time to
time hereafter may be amended.
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ORDINANCE NO.
AN ORDINANCE TO AMEND §173.08 ARKANSAS ENERGY
CODE OF THE BUILDING REGULATIONS CHAPTER OF
THE U.D.C. TO ADOPT THE 2009 INTERNATIONAL
ENERGY CONSERVATION CODE, FOR RESIDENTIAL
STRUCTURES, WITH AMENDMENTS HEREIN.
WHEREAS, Fayetteville customers spend over$50 million annually for electricity and
natural gas services; and
WHEREAS, more efficient buildings can conserve energy, reduce stress on our
electricity grid and natural gas supplies while saving money and resources for our citizens; and
WHEREAS, improved building codes emphasizing energy conservation can reduce
future energy consumption and the costs associated with energy production; and
WHEREAS, the existing State adopted and amended 2003 International Energy
Conservation Code is inferior in comparison with the 2009 International Energy Conservation
Code; and
WHEREAS, pursuant to A.C.A §14-55-206 and 207, the City of Fayetteville has
published notice in the Northwest Arkansas Times that the City Council will consider enacting
an ordinance to adopt and require all new residential construction and renovations to comply
with the 2009 International Energy Conservation Code, three copies of which are available for
public inspection and review in the Fayetteville City Clerk's Office.
NOW, THEREFORE, BE IT ORDAINED BY THE CITY COUNCIL OF THE
CITY OF FAYETTEVILLE,ARKANSAS:
Section 1. That the City Council of the City of Fayetteville, Arkansas hereby repeals
§173.08 Arkansas Energy Code of the Unified Development Code and enacts a replacement
§173.08 Energy Conservation Code as shown below:
"§173.08 Energy Conservation Code
(A) Commercial.•The Arkansas Energy Code, its Rules and Regulations as adopted
and promulgated by the Arkansas Energy Office, and as from time to time
hereafter may be amended, is hereby adopted by reference pursuant to A.C.A. §
14-55-206 and § 14-55-207.
(B) Residential. The 2009 International Energy Conservation Code (IECC) is hereby
adopted by reference for all new residential structures with the exception of§107
Fees and §109 Board of Appeals.
(1) New residential construction.
The 2009 IECC is hereby amended by adding a provision requiring a Home
Energy Rating System (HERS) Index rating for new residential construction.
The City of Fayetteville requires that all new residential construction have a
Home Energy Rating System (HERS) Index rating completed by an
independent RESNET certified home energy rater, or equivalent, prior to the
issuance of a Certificate of Occupancy. Residential developments that utilize
the exact same floor plan multiple times are required to have a HERS Index
rating completed on a minimum of 20% of the residential units.
(2) Sticker.
A sticker provided by the city shall be posted in a very visible location near
the front entrance to the residential structure indicating the estimated monthly
utility cost as derived from the HERS Index rating until the structure is sold,
or for at least 90 days, whichever is less.
(3) Additions, Alteration and renovations.
All additions, alterations and renovations to existing residential structures
shall comply with the standards of the 2009 IECC, but shall not be required to
provide a HERS Index rating or post a sticker. Where it is shown to be
impractical to meet the 2009 IECC, the Building Official may permit
additions, alterations and renovations to comply with the Arkansas Energy
Code, its Rules and Regulations as adopted and promulgated by the Arkansas
Energy Office, and as from time to time hereafter may be amended.
(4) Repairs.
All repairs to existing residential structures and mechanical systems need only
be constructed to at least the same energy conservation standard as the
damaged structure or mechanical system which needed repair unless a higher
standard is required by the Arkansas Energy Code.
(5) Fees.
§107 Fees of the IECC is removed to reflect that only the City Council can set
required fees and any refund policy, the "code official" cannot set fees nor a
refund policy. All fees shall be as prescribed in the Unified Development
Code.
(6) Appeals.
§109 Board of Appeals shall be removed from the IECC and have no force or
application. Appeals of the Building Official's interpretation of this
Intemational Energy Conservation Code shall be heard by the existing Board
of Construction Appeals and no new Board of Appeals for interpreting the
Intemational Energy Conservation Code shall be created by this Code.
Section 2. That in order to adequately prepare the residential construction industry for the
2009 International Energy Conservation Code (IECC) and the related new testing requirements,
the effective date of the new code shall be implemented in stages as follows:
(1) All provisions of the adopted 2009 IECC, as amended, shall become effective
on September 03, 2012, with the exception that a Certificate of Occupancy
may be issued even if a residential structure does not pass the air
sealing/infiltration or duct sealing testing requirements.
(2) The HERS Index rating and associated sticker requirements shall become
effective on September 03, 2012.
(3) All provisions of the adopted 2009 IECC, as amended, shall be effective on
March 06, 2013.
PASSED and APPROVED this day of , 2012.
APPROVED: ATTEST:
By: By:
LIONELD JORDAN,Mayor SONDRA E. SMITH, City Clerk/Treasurer
RESOLUTION NO. 117-11
A RESOLUTION TO REQUEST THAT MAYOR JORDAN HAVE CITY
STAFF EXAMINE CITY BUILDING CODES AND RECOMMEND
AMENDMENTS TO FURTHER PROMOTE SUSTAINABLE PRACTICES
AND ENERGY CONSERVATION FOR CITY COUNCIL CONSIDERATION
WHEREAS, Fayetteville customers spend over $50 million annually for electrical and
natural gas services; and
WHEREAS, over 80% of Fayetteville's electrical power is produced from coal imported
from Colorado and Wyoming; and
WHEREAS, buildings in the United States consume over 40% of all energy and 70% of
all electricity used in the United States; and
WHEREAS, more efficient buildings can conserve energy, reduce stress on our electric
grid and natural gas supplies and save money as well as resources; and
WHEREAS, improved building codes emphasizing sustainability and energy
conservation can favorably impact future energy consumption and all the costs associated with
energy production.
NOW, THEREFORE BE IT RESOLVED BY THE CITY COUNCIL OF THE
CITY OF FAYETTEVILLE, ARKANSAS:
Section 1: That the City Council of the City of Fayetteville, Arkansas hereby requests
that Mayor Jordan have his City staff examine Fayetteville's current building codes and
recommend possible changes to encourage feasible improvements for increased energy
conservation and overall sustainability for City Council consideration.
PASSED and APPROVED this 5'h day of July, 2011.
APPROVED:
0
ATTEST:
SONDRA E. SMITH;
FAYETTEViLLE;
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Analysis of Residential Energy Codes
Residential Building Code Task Force
City of Fayetteville Sustainability and Strategic Planning Department
2012
Background: On July 5, 2011 the City Council passed Resolution 117-11 directing City Staff to
examine Fayetteville's current building codes and recommend possible changes to encourage
energy efficiency improvements for City Council consideration. A Residential Building Code
Task Force was formed comprised of local home builders, architects and energy performance
consultants tasked with researching, modeling and developing a recommendation for the adoption
of energy code changes.
Process: The Residential Building Code Task Force met a total of four times in 2011 and 2012.
The Task Force utilized the expertise of its members to model the energy efficiency of a "typical"
1,824 sq. ft. home according to four different sets of building codes; the 2003, 2009 and 2012
International Energy Efficiency Codes (IECC) and the Energy Star Code. The results of this
modeling exercise are included in the attached spreadsheets.
Comparison between the 2003, 2006, 2009 and 2012 International Energy Conservation
Code (IECC) Building Envelope Requirements:
The IECC is typically published every three years. Each edition has some changes from the
previous one. The residential portion of the code was heavily revised in 2004 and climate zones
and building envelope requirements were restructured into a different format. This makes the post
2004 IECC codes much more concise and easier to use. However, these changes also complicate
comparisons of pre -2004 codes to the newer versions. The changes between the 2006, 2009 and
2012 IECC were mainly to improve energy efficiency and make the code more stringent.
The major building thermal envelope updates to the 2003 IECC are the U -factor and Solar Heat
Gain Coefficient (SHGC) requirements for fenestrations (windows) and the insulation R -factors
for foundations and walls.
The Building Thermal Envelope is defined as what separates the building from unconditioned
space. Windows are measured in terms of their thermal transmission, or U -factor. U -factor
measures the rate of heat transfer through a product. The lower the U -factor, the lower the amount
of heat loss, and the better a product is insulating a building. Solar Heat Gain refers to the
increase in temperature in a space, object or structure that results from solar radiation. The
amount of solar gain changes with the strength of the sun, and with the ability of any intervening
material to transmit or resist the radiation.
The thermal building envelope changes between the 2003, 2006 and 2009 versions of the IECC
are shown below:
2003 IECC adopted
by State with
amendments
2006 IECC
2009 IECC
Ceiling
R-38
R-38
R-38
Skylight U -factor
N/A
0.60
0.60
Fenestration U -factor
0.41
0.40
0.35
Fenestration SHGC
N/A
N/A
0.45
Wood Frame Wall
R-13
R-13
R-13
Mass Wall
R-8.1
R-5
R-5/10*
Floor
R-19
R-19
R-19
Basement Wall
R-10/13**
R-10/13**
R-10/13**
Slab
R-4
R-10,2 ft depth
R-10,2 ft depth
Crawls ace Wall
R-10/13**
R-10/13**
R-10/13**
* The second R -value applies when more than half the insulation is on the interior of the mass wall.
** The first R -value applies to continuous insulation, the second to framing cavity insulation; either insulation meets
the requirement.
Additional revisions to the 2009 IECC to improve energy efficiency included:
• The 2009 IECC requires that all sealed ducts located outside of the building's thermal
envelope be verified by conducting a duct tightness test. The 2003 and 2006 IECC
requires ducts to be sealed but not to a specific leakage rate verified by testing.
• 50% of the lighting lamps in a building have to be high efficiency in the 2009 IECC. The
2006 IECC has no lighting requirement.
• Trade off credit can no longer be obtained for high -efficiency heating, ventilation, and air
conditioning (HVAC) equipment in the 2009 IECC. For example, if a high efficiency
furnace is used, no reduction in wall insulation is allowed.
• A permanent sticker shall be posted on or in the electrical distribution panel that lists the
predominant R -values of the insulation in the ceiling/roof, walls, foundation and ducts
outside conditioned space. Also, the certificate shall list U -factors for window, the types
and efficiencies of heating, cooling, and water heating equipment.
The 2012 IECC continues this trend, with all of the 2009 requirements and heightened
requirements for efficiency within the thennal building envelope. Wood frame walls go from R-
13 insulation to 20; 75% of lighting fixtures are required to be high -efficiency; and the infiltration
standards are much more stringent. Importantly, the mechanical systems within a residence begin
to get much more scrutiny. In comparison, the 2003 IECC has no duct infiltration standards, the
2009 has 8 CFM per 100sf standard, and the 2012 IECC allows no more than 4 CFM per 100 sf
of infiltration. As noted in the following cost -benefit analysis, the 2012 IECC significantly
increases the cost of construction when compared to the current 2003 energy code, therefore the
committee chose not to pursue this option further.
Overview of the 2009 IECC with Anticipated Energy Cost/Benefit Analysis
The 2009 IECC is designed to save the consumer in utility costs because the building's thermal
envelope and duct system will be tighter allowing for less air infiltration and the solar heat gain
will be reduced with the improved window U -factor ratings. The efficient lighting requirements
require less energy thereby increasing efficiency. The 2009 IECC scope includes residential
single-family housing and multifamily housing three stories or less above -grade, intended for
permanent living. The code is intended to apply to new buildings and additions/alterations/
renovations/repairs.
Ceiling
R-38
Skylight U -factor
U-0,60
Window U -factor
U-0.35
Wood Frame Wall
R-13
Fenestration Solar Heat Gain
Coefficient SHGC
0.45
Mass Wall
R-5/10*
Floor
R-19
Basement Wall
R-10/13*
Slab
R-10, 2 ft depth
Crawls ace Wall
R-10/13*
* The first R -value applies to continuous insulation, the second to framing cavity
insulation; either insulation meets the requirement.
Additional requirements of the 2009 IECC include:
• Building envelope must be caulked and sealed.
• Supply ducts in attics must be insulated to R-8. Return ducts in attics and all ducts in
crawlspaces, unheated basements, garages, or otherwise outside the building envelope
must be insulated to R-6.
• All ducts must be sealed and either:
1. Verified by pressure testing. The duct system is tested and the air leakage out of
ducts must be kept to an acceptable maximum level.
2. All ductwork must be installed entirely within the building envelope. Testing is
not required if all ducts are inside the building thermal envelope.
• Less insulation is allowed for mass walls and more insulation is required for steel
framing.
• 50% of the lighting in a building must be high efficacy.
• Standard administrative requirements apply (inspections, documentation).
• A certificate must be posted near the electrical panel listing insulation levels and other
energy -efficiency measures.
Exemptions/allowances from prescriptive measures:
• One door and 15 square feet of window area are exempt.
Mandatory requirements:
Windows can never exceed an area -weighted average solar heat gain coefficient (SHGC) of 0.50.
Compliance Paths:
The 2003, 2006 and 2009 IECC all effectively contain three alternative compliance paths.
1. Prescriptive Measures. This is considered the simplest path. These requirements do not
vary by building size, shape, window area or other features. The 2009 IECC has a single
table of requirements for insulation R -values and window and door U -factors and SHGC.
2. Total building envelope UA (U -factor multiplied by area). This is the path predominantly
used by the REScheck software. Based on the prescriptive U -factor table, it allows trade-
offs whereby some energy efficiency measure can fall below code requirements if
balanced by other measures that exceed code requirements.
Simulated performance path. This path allows compliance if the home has calculated
annual energy consumption equal to or less than that of a standard reference design that
meets the code's prescriptive requirements. This path allows for crediting energy
efficiency measures not accounted for in other paths, such as renewable energy measures.
The 2009 performance path differs from previous editions of the IECC in that it allows
no trade-off credit for the use of high efficiency space heating, space cooling or water
heating equipment.
Cost/Savings Analysis:
The Residential Building Code Task Force performed an analysis comparing the same
1,824 sq. ft. home constructed under both the 2003 IECC and the 2009 IECC and modeled with
either gas or electric heat. The resulting analysis estimated an annual energy cost savings of $267
for the gas home and $344 for the electric home. The additional cost for building to the higher
efficiency standards of the 2009 IECC was $2,049, or amortized over a 30 year loan, $132
annually. This represents a net average annual energy savings for the home built to 2009
IECC standards of $135 for the gas heated home and $209 for the electric heated home.
Overview of the Energy Star Version 3 Code with Cost/Benefit Analysis
The Energy Star Qualified Homes Version 3 goes beyond the requirements of the 2009 IECC.
The Energy Star V3 code may be viewed as a stretch code to the 2009 IECC in that it requires
higher efficiencies in some of the thermal building envelope requirements, and it promotes higher
efficiency HVAC systems and appliances. The primary examples of this are; greater efficiencies
for window U -factors, tighter building envelope requirements, tighter duct sealing requirements
and increased foundation insulation installation requirements. Additionally, the Energy Star V3
code requires the installation of Energy Star certified appliances.
2009 IECC
Energy Star Version 3
Ceiling
R-38
R-38
Skylight U -factor
U-0.60
N/A
Fenestration U-
factor
U-0.35
U-0.32
Fenestration SHGC
0.45
0.40
Wood Frame Wall
R-13
R-13
Floor
R-19
R-19
Basement Wall
R-10/13*
R-19
Slab
R -l0. 2 ft de th
R-19
Crawls ace Wall
R-10/13
R-13
Some additional significant features of the Energy Star Qualified Homes, Version 3 that
differentiate it from the 2009 IECC include:
2009 IECC
Energy Star V-3
HVAC
7.7 HSPF / 13 SEER / 11 EER
ASHP — electric backup
8.5 HSPF / 14.5 SEER / 12
EER ASHP — electric backup
Ceiling Insulation Installation
Grade II Installation
Grade I Installation
AG Wall Insulation
Installation
Grade III Installation
Grade I Installation
Foundation Insulation
Installation
Grade II Installation
Grade I Installation
Infiltration
7.0 ACH50
5.0 ACH50
Water Heater
0.90 EF Electric DHW, 52
Gallons
0.92 EF Electric DHW, 52
Gallons
Dishwasher
Standard Efficiency
Energy Star
Refrigerator
Standard Efficiency
Energy Star
Lighting
50 % Fluorescent
80 % Energy Star Fluorescent
Bathroom Exhaust Fans
Standard Efficiency
Energy Star Exhaust Fans
Energy Star Cost/Saving Analysis:
Energy Star estimates that for a 2,200 sq. ft. all electric home with an unconditioned basement,
located in Climate Zone 4 the improved efficiency standards would increase the annual mortgage
cost by $264. The estimated monthly utility savings would be $420, for a net cash flow
increase of $156/year for the homeowner.
Conclusion
The 2003 IECC adopted and amended by the State of Arkansas has been improved on by
subsequent code updates in recent years. The 2009 IECC has significantly higher thermal
building envelope requirements then the 2003 IECC achieved primarily through higher efficiency
windows and doors, better slab insulation, ductwork insulation and sealing requirements to reduce
infiltration. The Energy Star V3 code has even higher efficiency requirements then the 2009
IECC and could be considered a stretch code. Both the 2009 IECC and the Energy Star V3 code
have been shown to achieve a demonstrable net return on investment for the homeowner.
Recommendation
Based on the analysis performed calculating the cost of implementing the new energy code with
the energy savings a homeowner could realize, the Residential Building Code Task Force and
Staff recommends that the City adopt the 2009 IECC with the additional requirement for a Home
Energy Rating (HERS) for all new residential construction. The HERS would provide a common
denominator for all homebuilders and contractors to measure performance and will ensure that
the construction techniques for all of these systems are sound, Staff would also recommend that
the City require a Home Performance Sticker be placed in a prominent location near the front
door showing the estimated monthly utility cost until the home is sold. This provides homebuyers
the information needed to make an informed decision when making one of the largest investments
a family can make, The Home Performance Sticker can also be a marketing tool for the
homebuilders that wish to excel in this area.
SF Residential Structure
2003 IECC State Ver,
20091ECC
Cost
2012 IECC
Cost
Energy STAR Ver. 3
Cost
Ceiling
R-38
R-38
$0
R-49
5
100.08
R-38
50
Skylight U -factor
N/A
0.6
N/A
0.55
N/A
N/A
N/A
Fenestration U -factor
0.41
0.35
see windows and doors
0.35
see windows and doors
0.32
see windows and doors
Fenestration SHGC
N/A
0.45
0.4
0.4
Doors
R-1.3
R-2.9
$
40.00
R-2.9
$
40.00
R-4.8
Standard
Wood Frame Wall
R-13
R-13
5
20 or 13+5'""
$
1.115-59
R-13
$
Mass Wall
R-8.1
R-5/10•
N/A
R-8/13
N/A
Not Specified
N/A
Crawlspace Floor
R-19
R-19
N/A
19
N/A
R-19
N/A
Basement Wall
R -1D/13""
R-10/13"
N/A
R-10113"
N/A
R-19
N/A
Slab
R-4
R-10, 2 ft depth
$
24152
R-10, 2 ft depth
$
241.52
8-10.2 ft depth
S
241.52
Crawlspace Wall
R-10/13"
R-10/13""
N/A
R-10/13""
N/A
R-13
N/A
Duct Blaster Test
No
Yes
S
380.00
Yes
5
380.00
Yes
$
380.00
Duct Infiltration
N/A
BCFM per 100 sf
5
90.00
4CFM per 100 sf
$
90.00
4CFM per 100 sf
S
9000
Duct Insulation
R-8 Attic/R-5.6 Other
R-8 Attic/R-6 Other
R-8 Attic/R-6 Other
R-8 Attic/R-6 Other
HVAC Specs (Gas)
10 SEER w 78% AFUE
13 SEER w 78% AFUE
N/A
13 SEER 78% AFUE
N/A
13 SEER 90% AFUE
N/A
HVAC Specs (Electric)
6.8 HSPF/10 SEER
7.7 HSPF/13 SEER
$
-
7.7 HSPF/13 SEER
$
-
8.5 HSPF/14.5 SEER
S
293.00
Trade Off Credits
Allowed
NotAllowed
N/A
NotAllowed
N/A
Not Allowed
N/A
Blower Door Test
No
Yes
$
380.00
Yes
5
380.00
Yes
$
380.00
Infiltration
N/A
7.0 ACHSO
S
528.60
3 ACHSO
5
600.00
S.C ACHSO
5
565.00
Caulk & Seal
Yes
Yes
$
100.00
Yes
$
100.00
Yes
5
100.00
Lighting
N/A
50% High Efficacy
5
700.00
75% High Efficacy
5
300.00
80% EnerSTAR
$
320.00
Programmable Therm
No
Yes
$
25.00
Yes
$
25.00
Yes
S
25.00
Windows SHGC
N/A
0.4
5
204.16
0.4
S
204.16
N/A
5
204.16
Sticker in Panel
No
Yes
Incl.
with blower
door test
Yes
Incl. with blower door test
N/A
Incl. with blower door lest
Dishwasher
Standard
Standard
$
Standard
S
Energy STAR
Standard
Water neater
Standard
Standard
$
Standard
$
-
Energy STAR
Standard
Refrigerator
Standard
Standard
Not supplied
Standard
Not supplied
Energy STAR
Nol supplied
Bathroom Exhaust
Standard
Standard
RCS
'Standard
RCS
T�%,... :STARt}i.:-.I
$
50.00
Total
$
2,189.28
$
3,576.35
L $2,648.48
Additional items Required for Energy Star Version 3
Gasketed cover for Attic insulation access or pull -down stairway
$
124.00
Sheetrock sealed to top plate at all attic/wall interfaces using caulk, foam, or equivalent material.
5
20000
Kickout flashing required at bottom of all roof to wall
intersections
Standard
Self sealing bituminous membrane at all valleys and roof deck penetrations
5
50.00
emem board or eguiva ent mor5,ure resistant uar ier Ntn J ano shower enclosures composed of .i e
or panel assemblies with caulked joints. Paper -faced backerboard shall not be used.
5
35.00
Building Materials with visible water damage or mold shall not be used.
Standard
Energy
Star Version 3 TOTAL
$ 3,057.68
- The second 8 -value applies when more than half the insulation is on the interior of the mass wall
The first R -value applies to the continuous insulation, the second to framing cavity insulation; either insulation meets the requirement.
First value is cavity insulation, second is continuous insulation or insulated siding.
# subtotal for Energy star items listed above
CODE VERSION
FUEL TYPE*
UTILITIES $/YR**
DESIGN LOADS Heat/Cool
St TONS
MM BTU/YR
HERS INDEX
(kBTU/hr)
2003 IECC AR version
Gas
$1,725
37.8/25.9
2.5
114.5
100
Electric
$1,898
37.8/25.9
2.5
69.8
100
20091ECC
Gas
$1,458
32.6/21.3
2.0
94.6
84
"
Electric
$1,560
32.6/21.3
2.0
61.3
86
20121ECC
Gas
$1,214
22.9/14.2
1.5
75.7
74
"
Electric
$1,404
22.9/16.4
1.5
51
78
ENERGY STAR v.3
Gas
$1,166
25.3/17.7
1.5
72.1
66
"
Electric
$1,227
25.3/17.7
1.5
44.3
65
*Gas --furnace and water heater: Electric --heat pump and water heater
**Utility rates: $0.09/kWh elec., $1.00/CCF gas
CODE VERSION
FUEL TYPE*
UTILITIES
DESIGN LOADS
# TONS
MM BTU/YR
HERS INDEX
ADDED COST
Avg Monthly
Ammortized Cost/
$/YR**
Heat/Cool (kBTU/hr)
Savings
Monthly Add
2003 IECC AR
Gas
$1,725
37.8/25.9
2.5
114.5
100
Electric
$1,898
37.8/25.9
2.5
69.8
100
20091ECC
Gas
$1,458
32.6/21.3
2.0
94.6
84
$ 22.25
Electric
$1,560
32.6/21.3
2.0
61.3
86
$ 2,049.28
$ 28.17
5 11.00
2012 IECC
Gas
$1,214
22.9/14.2
1.5
75.7
74
$ 42.58
Electric
$1,404
22.9/16.4
1.5
51
78
$ 3,436.35
$ 41.17
$ 18.45
ENERGY STAR v.3
Gas
$1,166
25.3/17.7
1.5
72.1
66
$ 46.58
Electric
$1,227
25.3/17.7
1.5
44.3
65
$ 3,057.68
$ 55.92
$ 16.41
*Gas --furnace and water heater: Electric --heat pump and water heater
**Utility rates: $0.09/kWh elec., $1.00/CCF gas
***30 year fixed mortgage with 5% interest rate
Climate Zones — Chapter 3
an-.
ea:r
INTERNATIONAL
CODE COUNCIL°
INTERNATIONAL ENERGY
CONSERVATION CODE
2
0
0
9
Page left intentionally blank
CHAPTER 1
ADMINISTRATION
I PART 1 -SCOPE AND APPLICATION
SECTION 101
SCOPE AND GENERAL REQUIREMENTS
101.1 Title. This code shall be known as the International
Energy Conservation Code of (NAME OF JURISDICTION], and
shall be cited as such. it is referred to herein as "this code."
101.2 Scope. This code applies to residential and commercial
buildings.
1013 ]Intent. This code shall regulate the design and construc-
tion of buildings for the effective use of energy. This code is
intended to provide flexibility to permit the use of innovative
approaches and techniques to achieve the effective use of
energy- This code is not intended to abridge safety, health or
environmental requirements contained in other applicable
codes or ordinances.
101.4 Applicability. Where, in any specific case, different sec-
tions of this code specify different materials, methods of con-
struction or other requirements, the most restrictive shall
govern. Where there is a conflict between a general requite-
ment and a specific requirement, the specific requirement shall
govern.
101.4.1 Existing buildings. Except as specified in this
chapter, this code shall not be used to require the removal,
alteration or abandonment of, nor prevent the continued use
and maintenance of, an existing building or building system
lawfully in existence at the time of adoption of this code.
101.4.2 Historic buildings. Any building or structure that is
listed in the State or National Register of Historic Places;
designated as a historic property under local or state desig-
nation law or survey; certified as a contributing resource
with a National Register listed or locally designated historic
district; or with an opinion or certification that the property
is eligible to be listed on the National or State Registers of
Historic Places either individually or as a contributing
building to a historic district by the State Historic Preserva-
tion Officer or the Keeper of the National Register of His-
toric Places, are exempt from this code.
101.4.3 Additions, alterations, renovations or repairs.
Additions, alterations, renovations or repairs to an existing
building, building system or portion thereof shall conform
to the provisions of this code as they relate to new construc-
tion without requiring the unaltered portion(s) of the exist-
ing building or building system to comply with this code.
Additions, alterations, renovations or repairs shall not cre-
ate an unsafe or hazardous condition or overload existing
building systems. An addition shall be deemed to comply
with this code if the addition alone complies or if the exist-
ing building and addition comply with this code as a single
building.
Exception: The following need not comply provided the
energy use of the building is not increased:
1. Storm windows installed over existing fenestra-
tion.
2. Glass only replacements in an existing sash and
frame.
3. Existing ceiling, wall or floor cavities exposed
during construction provided that these cavities
are filled with insulation.
4. Construction where the existing roof, wall or floor
cavity is not exposed.
5. Reroofing for roofs where neither the sheathing
nor the insulation is exposed. Roofs without insu-
lation in the cavity and where the sheathing or
insulation is exposed during reroofing shall be
insulated either above or below the sheathing.
6. Replacemerft of existing doors that separate condi-
tioned space from the exterior shall not require the
installation of a vestibule or revolving door, pro-
vided, however, that an existing vestibule that sep-
arates a conditioned space from the exterior shall
not be removed,
7. Alterations that replace less than 50 percent of the
luminaires in a space, provided that such alter-
ations do not increase the installed interior lighting
power.
8. Alterations that replace only the bulb and ballast
within the existing luminaires in a space provided
that the alteration does not increase the installed
interior lighting power.
101.4.4 Change in occupancy or use. Spaces undergoing a
change in occupancy that would result in an increase in
demand for either fossil fuel or electrical energy shall com-
ply with this code. Where the use in a space changes from
one use in Table 505.5.2 to another use in Table 505.5.2, the
installed lighting wattage shall comply with Section 505.5.
101.45 Change in space conditioning. Any noncondi-
tioned space that is altered to become conditioned space
shall be required to be brought into full compliance with this
code,
101.4.6 Mixed occupancy. Where a building includes both
residential and commercial occupancies, each occupancy
shall be separately considered and meet the applicable pro-
visions of Chapter 4 for residential and Chapter 5 for com-
mercial.
2009 INTERNATIONAL ENERGY CONSERVATION CODE®
ADMINISTRATION
101.5 Compliance. Residential buildings shall meet the provi-
sions of Chapter 4. Commercial buildings shall meet the provi-
sions of Chapter 5.
101.5.1 Compliance materials. The code official shall be
permitted to approve specific computer software, work-
sheets, compliance manuals and other similar materials that
meet the intent of this code.
101.5.2 Low energy buildings. The following buildings, or
portions thereof, separated from the remainder of the build-
ing by building thermal envelope assemblies complying
with this code shall he exempt from the building thermal
envelope provisions of this code:
1. Those with a peak design rate of energy usage less
than 3.4 Btu/h-ft2 (10.7 W/m2) or 1.0 wattfft2 (10.7
W/m2) of floor area for space conditioningpurposes.
2. Those that do not contain conditioned space.
SECTION 102
ALTERNATE MATERIALS —METHOD
OF CONSTRUCTION, DESIGN
OR INSULATING SYSTEMS
102.1 General. This code is not intended to prevent the use of
any material, method of construction, design or insulating sys-
tem not specifically prescribed herein, provided that such con-
struction, design or insulating system has been approved by the
code official as meeting the intent of this code.
102.1.1 Above code programs. The code official or other
authority having jurisdiction shall be permitted to deem a
national, state or local energy efficiency program to exceed
the energy efficiency required by this code. Buildings
approved in writing by such an energy efficiency program
shall be considered in compliance with this code. The
requirements identified as "mandatory" in Chapters 4 and 5
of this code, as applicable, shall be met.
I PART 2 —ADMINISTRATION AND ENFORCEMENT
SECTION 103
CONSTRUCTION DOCUMENTS
103.1 General. Construction documents and other supporting
data shall be submitted in one or more sets with each applica-
tion fora permit. The construction documents shall be prepared
by a registered design professional where required by the stat-
utes of the jurisdiction in which the project is to be constructed.
Where special conditions exist, the code official is authorized
to require necessary construction documents to be prepared by
a registered design professional.
Exception: The code official is authorized to waive the
requirements for construction documents or other support-
ing data if the code official determines they are not neces-
sary to confirm compliance with this code.
103.2 Information on construction documents. Construc-
tion documents shall be drawn to scale upon suitable material.
Electronic media documents are permitted to be submitted
when approved by the code official. Construction documents
shall be of suff icient clarity to indicate [lie location, nature and
extent of the work proposed, and show in sufficient detail perti-
nent data and features of the building, systems and equipment
as herein governed. Details shall include, but arc not limited to,
as applicable, insulation materials and their R -values; fenestra-
tion U -factors and SHGCs; area -weighted U -factor and SI IGC
calculations; mechanical system design criteria; mechanical
and service water heating system and equipment types, sizes
and efficiencies; economizer description; equipment and sys-
tems controls; fan motor horsepower (hp) and controls; duct
sealing, duct and pipe insulation and location; lighting fixture
schedule with wattage and control narrative; and air sealing
details.
103.3 Examination of documents. The code official shall
examine or cause to be examined the accompanying construc-
tion documents and shall ascertain whether the construction
indicated and described is in accordance with the requirements
of this code and other pertinent laws or ordinances.
103.3.1 Approval of construction documents. When the
code official issues a permit where construction documents
are required, the construction documents shall be endorsed
in writing and stamped "Reviewed for Code Compliance."
Such approved construction documents shall not be
changed, modified or altered without authorization from the
code official. Work shall he done in accordance with the
approved construction documents.
one set of construction documents so reviewed shall be
retained by the code official. The other set shall be returned
to the applicant, kept at the site of work and shall be open to
inspection by the code official or a duly authorized repre-
sentative.
1032.2 Previous approvals. This code shall not require
changes in the construction documents, construction or des-
ignated occupancy of a structure for which a lawful permit
has been heretofore issued or otherwise lawfully autho-
rized, and the construction of which has been pursued in
good faith within 190 days after the effective date of this
code and has not been abandoned.
103,3,3 Phased approval, The code official shall have the
authority to issue a permit for the construction of part of an
energy conservation system before the construction docu-
ments for the entire system have been submitted or
approved, provided adequate information and detailed
statements have been tiled complying with all pertinent
requirements of this code. The holders of such permit shall
proceed at their own risk without assurance that the permit
for the entire energy conservation system will be granted.
103.4 Amended construction documents. Changes made
during construction that are not in compliance with the
approved construction documents shall be resubmitted for
approval as an amended set of construction documents.
103.5 Retention of construction documents. One set of
approved construction documents shall be retained by the code
official for a period of not less than 180 days from date of com-
pletion of the permitted work, or as required by state or local
laws.
2009 INTERNATIONAL ENERGY CONSERVATION CODEa
ADMINISTRATION
SECTION 104
INSPECTIONS
104.1 General. Construction or work for which a permit is
required shall be subject to inspection by the code official.
104.2 Required approvals. Work shall not be done beyond the
point indicated in each successive inspection without first
obtaining the approval of the code official. The code official,
upon notification, shall make the requested inspections and
shalt either indicate the portion of the construction that is satis-
factory as completed, or notify the permit holder or his or her
agent wherein the same fails to comply with this coda Any por-
tions that do not comply shall be corrected and such portion
shall not be covered or concealed until authorized by the code
official.
104.3 Final inspection. The building shall have a final inspec-
tion and not be occupied until approved.
104.4 Reinspection. A building shall be reinspected when
determined necessary by the code official.
104.5 Approved inspection agencies. The code official is
authorized to accept reports of approved inspection agencies,
provided such agencies satisfy the requirements as to qualifica-
tions and reliability.
104.6 inspection requests. It shall be the duty of the holder of
the permit or their duly authorized agent to notify the code offi-
cial when work is ready for inspection. It shall be the duty of
the permit holder to provide access to and meters for inspec-
tions of such work that are required by this code.
104.7 Reinspection and testing. Where any work or installa-
tion does not pass an initial test or inspection, the necessary
corrections shah be made so as to achieve compliance with this
code. The work or installation shall then be resubmitted to the
code official for inspection and testing.
104.8 Approval. After the prescribed tests and inspections
indicate that the work complies in all respects with this code, a
notice of approval shall be issued by the code official.
104.8.1 Revocation. The code official is authorized to. in
writing, suspend or (evoke a notice of approval issued under
the provisions of this code wherever the certificate is issued
in error, or on the basis of incorrect information supplied, or
where it is determined that the building or structure, prem-
ise, or portion thereof is in violation of any ordinance or reg-
ulation or any of the provisions of this code.
SECTION 105
VALIDITY
105.1 General. If a portion of this code is held to be illegal or
void, such a decision shall not affect the validity of the remain-
der of this code.
SECTION 106
REFERENCED STANDARDS
1106.1 General. The codes and standards referenced in this
code shall be those listed in Chapter 6, and such codes and stan-
2009INTERNATIONAL ENERGY CONSERVATION CODE®
dards shall be considered as part of the requirements of this
code to the prescribed extent of each such reference.
106.2 Conflicting requirements. Where the provisions of this
code and the referenced standards conflict, the provisions of
this code shall take precedence.
106.3 Application of references. References to chapter or sec-
tion numbers, or to provisions not specifically identified by
number, shall be construed to refer to such chapter, section or
provision of this code.
106.4 Other laws. The provisions of this code shall not be
deemed to nullify any provisions of local, state or federal law.
SECTION 107
FEES
107.1 Fees. A permit shall not be issued until the fees pre-
scribed in Section 107.2 have been paid, nor shall an amend-
ment to a permit be released until the additional fee, if any, has
been paid.
107.2 Schedule of permit fees. A fee for each permit shall be
paid as required, in accordance with the schedule as established
by the applicable governing authority.
107.3 Work commencing before permit issuance. Any per-
son who commences any work before obtaining the necessary
permits shall be subject to an additional fee established by the
code official, which shall be in addition to the required permit
fees.
107.4 Related fees. The payment of the fee for the construc-
tion, alteration, removal or demolition of work done in connec-
tion to or concurrently with the work or activity authorized by a
permit shall not relieve the applicant or holder of the permit
from the payment of other fees that are prescribed by law.
107.5 Refunds. The code official is authorized to establish a
refund policy.
SECTION 108
STOP WORK ORDER
108.1 Authority. Whenever the code official finds any work
regulated by this code being performed in a manner either con-
trary to the provisions of this code or dangerous or unsafe, the
code official is authorized to issue a stop work order.
108.2 Issuance. The stop work order shall be in writing and
shall be given to the owner of the property involved, or to the
owner's agent, or to the person doing the work. Upon issuance
of a stop work order, the cited work shall immediately cease.
The stop work order shall state the reason for the order, and the
conditions under which the cited work will be permitted to
resume.
108.3 Emergencies. Where an emergency exists, the code offi-
cial shall not be required to give a written notice prior to stop-
ping the work.
108.4 Failure to comply. Any person who shall continue any
work after having been served with a stop work order, except
such work as that person is directed to perform to remove a vi-
ADMINISTRATION
lation or unsafe condition, shall be liable to a fine of not less
than [AMOUNT] dollars or more than [AMOUNT] dollars.
SECTION 109
BOARD OF APPEALS
109.1 General. In order to hear and decide appeals of orders,
decisions or determinations made by the code official relative
to the application and interpretation of this code, there shall be
and is hereby created a board of appeals. The code official shall
be an ex officio member of said board but shall have no vote on
any matter before the board. The board of appeals shall he
appointed by the governing body and shall hold office at its
pleasure. The board shall adopt rulesofproccdu aforconduct-
ing its business, and shall render all decisions and findings in
writing to the appellant with a duplicate copy to the code offi-
cial.
109.2 Limitations on authority. An application for appeal
shall be based on a claim that the true intent of this code or the
rules legally adopted thereunder have been incorrectly inter-
preted, the provisions of this code do not fully apply or an
equally good or better form of construction is proposed. The
board shall have no authority to waive requirements of this
code. -
109.3 Qualifications. The board of appeals shall consist of
members who are qualified by experience and training and are
not employees of the jurisdiction.
2009 INTERNATIONAL ENERGY CONSERVATION CODE®
CHAPTER 4
RESIDENTIAL ENERGY EFFICIENCY
SECTION 401
GENERAL
401.1 Scope. This chapter applies to residential buildings.
401.2 Compliance. Projects shall comply with Sections 401,
402.4, 402.5, and 403.1, 403.2.2, 403.2.3, and 403.3 through
403.9 (referred to as the mandatory provisions) and either:
1. Sections 402.1 through 402.3, 403.2.1 and 404.1 (pre-
scriptive); or
2. Section 405 (performance).
401.3 Certificate. A permanent certificate shall be posted on or
in the electrical distribution panel. The certificate shall not cover
or obstruct the visibility of the circuit directory label, service dis-
connect label or other required labels. The certificate shall be
completed by the builder or registered design professional. The
certificate shall list the predominant R -values of insulation
installed in or on ceiling/roof, walls, foundation (slab, basement
wall, crawlspace wall and/or floor) and ducts outside condi-
tioned spaces; U -factors for fenestration and the solar heat gain
coefficient (SHGC) of fenestration. Where there is more than one
value for each component, the certificate shall list the value cover-
ing the largest area. The certificate shall list the types and efficien-
cies of heating, cooling and service water heating equipment.
Where a gas -fired unvented room heater, electric furnace, or base-
board electric heater is installed in the residence, the certificate
shall list "gas -fired unvented room heater," "electric furnace" or
"baseboard electric heater;' as appropriate. An efficiency shall not
be listed for gas -fired unvented room heaters, electric furnaces or
electric baseboard heaters.
SECTION 402
BUILDING THERMAL ENVELOPE
402.1 General (Prescriptive).
402.1.1 Insulation and fenestration criteria. The building
thermal envelope shall meet the requirements of Table
402.1.1 based on the climate zone specified in Chapter 3.
402.1.2 R•value computation. Insulation material used in
layers, such as framing cavity insulation and insulating
sheathing, shall be summed to compute the component
R -value, The manufacturer's settled R -value shall be used
for blown insulation. Computed R -values shall not include
an R -value for other building materials or air films.
TABLE 402.1.1
INSULATION AND FENESTRATION REQUIREMENTS BY COMPONENT'
CRAWL
CLIMATE
ZONE
FENESTRATION
U -FACTOR°
SKYLIGHT*
LFFACTOR
GLAZED
FENESTRATION
SHGC ",°
CEILING
R -VALUE
WOOD
FRAME WALL
R -VALUE
MASS
WALL
R -VALUE!
FLOOR
R -VALUE
BASEMENT`
WALL
fl -VALUE
0
SLABd
fl -VALUE
& DEPTH
SPACE°
WALL
fl -VALUE
I
1.2
0.75
_
0.30
30
13
3/4
13
0
0
2
0.65i
0.75
0.30
30
13
4/6
13
0
0
0
3
0.5O1
0.65
0.30
30
13
5/8
19
5l13r
0
5/13
4 except
Marine
0.35
0.60
NR
38
13
5/10
19
10113
10, 2 R
10/13
5 Marine 4 and
Iv
0.35
0.60
NR
38
20 or 13+5"
13/17
309
10/13
10, 2 ft
10/13
6
0.35
0.60
NR
49
20 or 13+5"
15/19
3O9
15/19
10, 4 ft
10/13
7 and 8
0.35
0.60
NR
49
21
19/21
389
15/19
10,4 f
10/13
For SI: 1 foot= 304.8 mm.
a. R -values are minimums. U -factors and SHGC are maximums.R-19batiseompressed into a nomina12 x 6 framingcavitysuch that theR-valueis reducedby R -For
more shall be marked with the compressed bait R -value in addition to the full thickness R -value.
b. The fenestration U -factor column excludes skylights. The SHGC column applies to all glazed fenestration.
c. "15/19" means R-15 continuous insulated sheathing on the interior or exteriorof the home or R-19 cavity insulation at the interior of the basement wall. "15/t9"
shall bepennitted to bernet withR-13 cavity insulation on the interiorofthe basement wallplusR-5 continuous insulated sheathing onthe interiororexteriorofthe
home."10113" means R-10 continuous insulated sheathing on the interior orexxt for of thehomeorlt-13 cavity insulation at the interior of the hasementwall.
d. R-5 shall be added to the required slab edge R -values for heated slabs. Insulation depth shall be the depth of the footing or 2 feet, whichever is less in Zones 1
through 3 for heated slabs.
e. There are no SHGC requirements in the Marine Zone.
f. Basement wall insulation is not required in warm -humid locations as defined by Figure 301.1 and Table 301.1.
g. Or insulation sufficient to fill the framing cavity, R-19 minimum,
h. "13+5" means R-13 cavity insulation plus R-5 insulated sheathing. If structural sheathing covers 25 percent or less of the exterior, insulating sheathing is not
required wherestmctural sheathing is used. If structural sheathing covers more than 25 percentof exterior, structural sheathing shall be supplemented with insu-
lated sheathing of at least R-2.
i. The second R -value applies when more than half the insulation is on the interior of the mass wall.
j. Forimpactmted fenestrationcomplying with Section 8301.2.1.2ofthelntenmrimialRestdentiat CodeorSection 1608.1.2ofthelnrernationalBuilding Code, the
maximum U -factor shall be 0.75 in Zone 2 and 0.65 in Zone 3.
2009 INTERNATIONAL ENERGY CONSERVATION CODE® 27
RESIDENTIAL ENERGY EFFICIENCY
TABLE 402.1.3
EQUIVALENT (-FACTORS'
CLIMATE
ZONE
FENESTRATION
U -FACTOR
SKYLIGHT
U -FACTOR
CEILING
U -FACTOR
FRAME
WALL
U -FACTOR
- -
MASS WALL
LLFACT0Rb
0.197
FLOOR
-FACTOR
0.064
0.064
BASEMENT
WALL
U -FACTOR
CRAWL
SPACE
WALL
U -FACTOR`
1
1.20
0.75
0.035
0.082
0.360
0.477
0.477
2
0.65
0.75
0.035
0.082
0.082
0.165
0-141
0.360
3
0.50
0.65
0.035
0.047
0.091
0,059
0.059
0.136
0.065
0.065
4 except Marine
0.35
0.60
0.030
0.082
0.141
0.047
sand Marine 4
0.35
0.60
0.030
0.057
0.082
0.060
0.033
6
0.35
0.60
0.026
0.057
0.033
0.050
0.065
0.065
7 and 8
0.35
0.60
0.026
0.057
0.057
0.028
0.050
a. Nonfenestration U -factors shall be obtained from measurement, calculation or an approved source.
b. When more than half the insulation is on the interior,the mass wall U -factors shall be a maximum of 0.17 in Zone 1,0,14 in Zune2,0.12 in Zone 3, 0.10 in Zone4
except Marine, and the same as the frame wall U -factor in Marine Zone 4 and Zones 5 through 8.
c. Basement wall U -factor of 0.360 in warm -humid locations as defined by Figure 301.1 and Table 301.1.
402.1.3 U -factor alternative. An assembly with a U -fac-
tor equal to or less than that specified in Table 402.1.3 shall
be permitted as an alternative to the R -value in Table
402.1.1.
402.1.4 Total UA alternative. If the total building thermal
envelope UA (sum of U -factor times assembly area) is less
than or equal to the total UA resulting from using the
V -factors in Table 402.1.3 (multiplied by the same assem-
bly area as in the proposed building), the building shall be
considered in compliance with Table 402.1.1. The UA cal-
culation shall be done using a method consistent with the
ASHRAE Handbook of Fundamentals and shall include
the thermal bridging effects of framing materials. The
SHGC requirements shall be met in addition to UA com-
pliance.
402.2 Specific insulation requirements (Prescriptive).
402.2.1 Ceilings with attic spaces. When Section 402.1.1
would require R-38 in the ceiling, R-30 shall be deemed to
satisfy the requirement for R-38 wherever the full height of
uncompressed R-30 insulation extends over the wall top
plate at the eaves. Similarly, R-38 shall be deemed to satisfy
the requirement for R-49 wherever the full height of uncom-
pressed R-38 insulation extends over the wall top plate at the
eaves. This reduction shall not apply to the U -factor alterna-
tive approach in Section 402.1.3 and the total UA alternative
in Section 402.1.4.
402.2.2 Ceilings without attic spaces. Where Section
402.1.1 would require insulation levels above R-30 and the
design of the roof/ceiling assembly does not allow sufficient
space for the required insulation, the minimum required
insulation for such rooflceiling assemblies shall be R-30.
This reduction of insulation from the requirements of Sea
tidn 402.1.1 shall be limited to 500 square feet (46 mz) or 20
percent of the total insulated ceiling area, whichever is less,
This reduction shall not apply to the U -factor alternative
approach in Section 402.1.3 and the total UA alternative in
Section 402.1.4.
402.2.3 Access hatches and doors. Access doors from
conditioned spaces to unconditioned spaces (e.g., attics
and crawl spaces) shall be weatherstripped and insulated to
a level equivalentlo the insulation on the surrounding sur-
faces. Access shall be provided to all equipment that pre-
vents damaging or compressing the insulation. A wood
framed or equivalent baffle or retainer is required to be
provided when loose fill insulation is installed, the purpose
of which is to prevent the loose fill insulation front spilling
into the living space when the attic access is opened, and to
provide a permanent means of maintaining the installed
R -value of the loose fill insulation.
402.2.4 Mass walls. Mass walls for the purposes of this
chapter shall be considered above -grade walls of concrete
block, concrete, insulated concrete form (ICF), masonry
cavity, brick (other than brick veneer), earth (adobe, com-
pressed earth block, rammed earth) and solid timber/logs.
402.2.5 Steel -frame ceilings, walls, and floors. Steel -
frame ceilings, walls and floors shall meet the insulation
requirements of Table 402.2,5 or shall meet the U -factor
requirements in Table 402.1,3. The calcu lation of the U -fac-
tor for a steel -frame envelope assembly shall use a series -
parallel path calculation method.
Exception! In Climate Zones 1 and 2, the continuous
insulation requirements in Table 402.2.5 shall be permit-
ted to be reduced to R-3 for steel frame wall assemblies
with studs spaced at 24 inches (610 mm) on center.
P8 2009 INTERNATIONAL ENERGY CONSERVATION CODE®
RESIDENTIAL ENERGY EFFICIENCY
TABLE 402.2.5
STEEL -FRAME CEILING, WALL AND FLOOR INSULATION
(R -VALUE)
WOOD FRAME
R -VALUE COLD -FORMED STEEL
REQUIREMENT EQUIVALENT R -VALUE'
Steel Truss Ceilinns°
R-30
R-38 or R-30 + 3 or R-26 + 5
R-38
R-49 or R-38 + 3
R-38 + 5
R-49
Steel Joist Celtin se
R-38 in 2x 4 or 2x 6 or 2x8
R-30 R-49 in anXfaming
R-38 R49 in. 2x4 or 2x6 or2x8 or 2 x 10
Steel -Framed Wall
R-13
R-13+5 or R-15+4 or R-21+3 or R-0+10
R-19
R-13+9 or R-19+8 or R-25+7�
R-21
R-13+loorR-19+9orR-25+8
Steel Joist Floor
R-19 in 2 x6
R-13
R-19+ 6in 2x 8 o 2x1 _
R-19+6 in2x6
R-19
R-19+l2in2x8or2x10
a Cavity insulation R -value is listed first, followed by continuous insulation
value,
b. b. Insulation exceeding the height of the framing shall cover the framing.
402.2.6 floors. Floor insulation shall be installed to main-
tain permanent contact with the underside of the subfloor
decking.
402.2.7 Basement walls. Walls associated with conditioned
basements shall be insulated from the top of the basement
wall down to 10 feet (3048 mm) below grade or to the base-
ment floor, whichever is less. Walls associated with uncon-
ditioned basements shall meet this requirement unless the
floor overhead is insulated in accordance with Sections
402.1.1 and 402.2.6.
402.2.8 Slab -on -grade floors. Slab -on -grade floors with a
floor surface less than 12 inches (305 mm) below grade
shall be insulated in accordance with Table 402.1.1. The
insulation shall extend downward from the top of the slab on
the outside or inside of the Foundation wall. Insulation
located below grade shall be extended the distance provided
in Table 402.1- I by any combination of vertical insulation,
insulation extending under the slab or insulation extending
out from the building. Insulation extending away from the
building shall be protected by pavement or by a minimum of
10 inches (254 mm) of soil. The top edge of the insulation
installed between the exterior wall and the edge of the inte-
rior slab shall be permitted to be cut at a 45 -degree (0.79 rad)
angle away from the exterior wall. Slab -edge insulation is
not required in jurisdictions designated by the code official
as having a very heavy termite infestation.
402.2.9 Crawl space walls. As an alternative to insulating
floors over crawl spaces, crawl space walls shall be permit-
ted to be insulated when the crawl space is not vented to the
outside. Crawl space wall insulation shall be permanently
fastened to the wall and extend downward from the floor to
the finished grade level and then vertically and/or horizon-
tally for at least an additional 24 inches (610 film). Gxposed
earth in unvenled crawl space foundations shall be covered
with a continuous Class I vapor retarder in accordance with
the Intentarional Building Code. All joints of the vapor
retarder shall overlap by 6 inches (153 mm) and he sealed or
taped. The edges of the vapor retarder shall extend at least 6
incites (153 mm) up the stein wall and shrill be attached to
the stem wall.
402.2.10 Masonry veneer. Insulation shall not be required
on the horizontal portion of the foundation that supports a
masonry veneer.
402.2.11 Thermally isolated sunroom insulation. The
min i lnunl ceiling insulation R -values shall be R-19 in Zones
I through 4 and R-24 in Zones 5 through 8. The tuinimum
wall R -value shall he R -I 3 in all zones. New wall(s) separat-
ing a sunroom from cowl Waned space shall meet the build-
ing thermal envelope requirements.
402.3 Fenestration. (Prescriptive).
402.3.1 U -factor. An area -weighted average of fenestration
products shall be permitted to satisfy the U -factor require-
ments.
402.3.2 Glazed fenestration SHGC. An area -weighted
average of fenestration products more than 50 percent
glazed shall be permitted to satisfy the SHGC requirements.
402.3.3 Glazed fenestration exemption. Up to 15 square
feet (1.4 m') of glazed fenestration per dwelling unit shall be
permitted to be exempt from U -factor and SHGC require-
menls in Section 402.1.1. This exemption shall not apply to
the U -factor alternative approach in Section 402.1.3 and the
Total UA alternative in Section 402.1.4.
402.3.4 Opaque door exemption. One side -hinged opaque
door assembly up to 24 square feet (2.22 m') in area is
exempted from the U -factor requirement in Section 402.1.1.
This exemption shall not apply to the U -factor alternative
approach in Section 402.1.3 and the total UA alternative in
Section 402.1.4.
402.3.5 Thermally isolated sunroom U -factor. For Zones
4 through 8, the maximum fenestration U -factor shall be
0.50 and the maximum skylight U -factor shall be 0.75. New
windows and doors separating the sunroom from condi-
tioned space shall meet the building thermal envelope
requirements.
402.3.6 Replacement fenestration. Where some or all of
an existing fenestration trait is replaced with a new fenestra-
tion product, including sash and glazing, the replacement
fenestration unit shall meet the applicable requirements for
U -factor and SHGC in Table 402.1.1.
402.4 Air leakage (Mandatory).
402.4.1 Building thermal envelope. The building thermal
envelope shall be durably scaled to limit infiltration- The
sealing methods between dissimilar materials shall allow
for differential expansion and contraction- The following
shall be caulked, gasketed, weatherstripped or otherwise
sealed with an air barrier material, suitable film or solid
material:
1. All joints, seams and penetrations.
2009 INTERNATIONAL ENERGY CONSERVATION CODED 29
RESIDENTIAL ENERGY EFFICIENCY
2. Site -built windows, doors and skylights.
3. Openings between window and door assemblies and
their respective jambs and framing.
4. Utility penetrations.
5. Dropped ceilings or chases adjacent to the thermal
envelope.
6. Knee walls.
7. Walls and ceilings separating a garage from condi-
tioned spaces.
8. Behind tubs and showers on exterior walls.
9. Common walls between dwelling units.
10. Attic access openings.
11. Rim joist junction.
12. Other sources of infiltration.
402.4.2 Air sealing and insulation. Building envelope air
tightness and insulation installation shall be demonstrated
to comply with one of the following options given by Sec-
tion 402.4.2.1 or 402.4.2.2:
442.4.2.1 Testing option. Building envelope tightness
and insulation installation shall be considered acceptable
when tested air leakage is less than seven air changes per
hour (ACH) when tested with a blower door at a pressure
of 50 pascals (I psf). Testing shall occur after rough in
and after installation of penetrations of the building
envelope, including penetrations for utilities. plumbing,
electrical, ventilation and combustion appliances.
During testing:
1. Exterior windows and doors, fireplace and stove
doors shall be closed, but not sealed;
2. Dampers shall be closed, but not sealed, including
exhaust, intake, makeup air, backdraft and flue
dampers;
3. Interior doors shall be open;
4. Exterior openings for continuous ventilation sys-
tems and heat recovery ventilators shall be closed
and sealed;
5. Heating and cooling system(s) shall be turned off;
6. HVAC ducts shall not be sealed; and
Supply and return registers shall not be sealed.
402.4.2.2 Visual inspection option. Building envelope
tightness and insulation installation shall be considered
acceptable when the items listed in Table 402.4,2, appli-
cable to the method of construction, are lick! verified.
Where required by the code official, an approved party
independent from the installer of the insulation shall
inspect the air barrier and insulation -
402.4.3 Fireplaces. New wood -burning fireplaces shall
have gasketed doors and outdoor combustion air.
402.4.4 Fenestration air leakage. Windows, skylights and
sliding glass doors shall have an air infiltration rate of no
more than 0.3 cfm per square foot (1.5 Us/m2), and swing-
ing doors no more than 0.5 cfm per square foot (2.6 Us/m2),
when tested according to NFRC 400 or AAMAIWDMA/
CSA lol/I.S.2/A440 by an accredited, independent labora-
tory and listed and labeled by the manufacturer.
Exceptions: Site -built windows, skylights and doors.
402.4.5 Recessed lighting. Recessed luminaires installed in
the building thermal envelope shall be sealed to limit air
leakage between conditioned and unconditioned spaces. All
recessed luminaires shall be IC -rated and labeled as meet-
ing ASTM E 283 when tested at 1.57 psf (75 Pa) pressure
differential with no more than 2.0 cfm (0.944 Us) of air
movement from the conditioned space to the ceiling cavity.
All recessed luminaires shall be sealed with a gasket or
caulk between the housing and the interior wall or ceiling
covering. 1a
402.5 Maximum fenestration U -factor and SHGC (Manda-
tory). The area -weighted average maximum fenestration
U -factor permitted using trade-offs from Section 402.1.4 or
405 shall be 0.48 in Zones 4 and 5 and 0.40 in Zones 6 through
8 for vertical fenestration, and 0.75 in Zones 4 through 8 for
skylights. The area -weighted average maximum fenestration
SHGC permitted using trade-offs from Section 405 in Zones I
through 3 shall be 0,50.
SECTION 403
SYSTEMS
403.1 Controls (Mandatory). At least one thermostat shall be
provided for each separate heating and cooling system.
403.1.1 Programmable thermostat. Where the primary
heating system is a forced -air furnace, at least one thermo-
stat per dwelling unit shall be capable of controlling the
heating and cooling system on a daily schedule to maintain
different temperature set points at different times of the day.
This thermostat shall include the capability to set back or
temporarily operate the system to maintain zone tempera-
tures down to 55°F (13°C) or up to 85°P (29°C) The ther-
mostat shall initially be progrartuned with a heating
temperature set point no higher than 70°F (21°C) and a
cooling temperature set point no lower than 78°F (26°C).
403.1.2 Heat pump supplementary heat (Mandatory).
Heat pumps having supplementary electrie.resistance heat
shall have controls that, except during defrost, prevent sup-
plemental heat operation when the heat pump compressor
can meet the heating load.
403.2 Ducts.
403.2.1 Insulation (Prescriptive). Supply ducts in attics
shall be insulated to a minimum of R-8. All other ducts shall
be insulated to a minimum of R-6.
Exception: Ducts or portions thereof located completely
inside the building thermal envelope.
403.2.2 Sealing (Mandatory). All ducts, air handlers, filter
boxes and building cavities used as ducts shall be sealed.
2009 INTERNATIONAL ENERGY CONSERVATION CODES
30
RESIDENTIAL ENERGY EFFICIENCY
Joints and seams shall comply with Section M1601.4.1 of
2. Rough -in test: Total leakage shall be less than or
to 6 cfm (169.9 Umin) per 100 ft2 (9.29 m') of
the International Residential Code.
equal
conditioned floor area when tested at a pressure dif-
Duct tightness shall be verified by either of the following:
ferential of 0.1 inches w.g. (25 Pa) across thcroughed
in system, including the manufacturer's air handler
1. Postconstruction test: Leakage to outdoors shall be
enclosure. All register boots shall be taped or other -
less than or equal to 8 elm (226.5 L/min) per 10o fP
wise sealed during the test. lithe air handier is not
(9.29 m2) of condirioned floor area or a total leakage
installed at the time of the test, total leakage shall be
less than or equal to 12 cfm (12 Umin) per 100 ft2
less than orequal to 4 cfm (113.3 Umin) per 100 ft2
(9.29 m2) of conditioned floor area when tested at a
(9.29 m2) of conditioned floor area.
pressure differential of 0.1 inches w.g. (25 Pa) across
the entire system, including the manu€acturer's air
Exceptions: Duct tightness testis not required if the air
handler enclosure. All register boots shall be taped or
handler and all ducts are located within conditioned
otherwise sealed during the test.
space.
TABLE 402.4.2
o,u ATlnu'.IcoerttnM rnMPONENT CRITERIA
AIR BARRIER A
-„ . JI. .../,•...v. .... _ -
COMPONENT
CRITERIA
Exterior thermal envelope insulation for framed walls is installed in substantial contact
and continuous alignment with building envelope air barrier.
Air barrier and thermal barrier
Breaks orjoints in the air barrier are filled or repaired.
Air -permeable insulation is not used as a sealing material.
Air- rmeable insulation is inside of an air barrier.
Air barrier in any dropped ceiling/soffit is substantially aligned with insulation and any
Ceiling/attic
gaps are sealed.
Attic access (except unvented attic), knee wall door, or drop down stair is sealed.
Corners and headers are insulated.
Walls
Junction of foundation and sill plate is sealed.
Windows and doors
Space between window/door jambs and framing is sealed.
Rim joists
Rim joists arc insulated and include an air barrier -
Floors
Insulation is installed to maintain permanent contact with underside of subfloor decking.
(including above -garage and cantilevered floors)
Air barrier is installed at anexposed edge of insulation.
Insulation is permanently attached to walls.
Crawl space walls
Exposed earth in unvented crawl spaces is covered with Class I vapor retarder with
overly ping joints taped.
Duct shafts, utility penetrations, knee walls and flue shafts opening to exterior or
Shafts, penetrations
unconditioned space are sealed.
Batts in narrow cavities are cut to fit, or narrow cavities are filled by sprayed/blown
Narrow cavities
insulation.
_
Garage separation f
Air sealing i provided between the garage and conditioned spaces.
Recessed light fixtures are air tight, IC rated, and sealed to drywall.
Recessed lighting
g g
Exception —fixtures in conditioned space.
Insulation is placed between outside and pipes. Batt insulation is cut to fit around wiring
Plumbing and wiring
and plumbing, or sprayed/blown insulation extends behind piping and wiring.
Showers and tubs on exterior walls have insulation and an air barrier separating them
Shower/tub on exterior wall
from the exterior wall.
Electrical/phone box on exterior walls
Air barrier extends behind boxes or air sealed -type boxes are installed.
Common wall
Air barrier is installed in common wall between dwelling units.
HVAC register boots
HV AC register boots that penetrate building envelope are sealed to subfloor or drywall.
Fireplace
Fireplace walls include an air barrier.
2009 INTERNATIONAL ENERGY CONSERVATION CODE® 31
RESIDENTIAL ENERGY EFFICIENCY
403.2.3 Building cavities (Mandatory). Building framing
cavities shall not be used as supply ducts.
403.3 Mechanical system piping insulation (Mandatory).
Mechanical system piping capable of carrying fluids above
105°F (41°C) or below 55°F (13°C) shall be insulated to a min-
imum of R-3. �\
403.4 Circulating hot water systems (Mandatory). All cir-
culating service hot water piping shall be insulated to at least
R-2. Circulating hot water systems shall include an automatic
or readily accessible manual switch that can turn off the hot-
water circulating pump when the system is not in rise.
403.5 Mechanical ventilation (Mandatory). Outdoor air
intakes and exhausts shall have automatic or gravity dampers
that close when the ventilation system is not operating.
403.6 Equipment sizing (Mandatory). Heating and cooling
equipment shall be sized in accordance with Section M 1401.3
of the International Residential Code.
403.7 Systems serving multiple dwelling units (Mandatory).
Systems serving multiple dwelling units shall comply with Sec-
tions 503 and 504 in lieu of Section 403.
403.8 Snow melt system controls (Mandatory). Snow- and
ice -melting systems, supplied through energy service to the
building, shall include automatic controls capable of shutting
off the system when the pavement temperature is above 50°F,
and no precipitation is falling and an automatic or manual con-
trol that will allow shutoff when the outdoor temperature is
above 40°F.
403.9 Pools (Mandatory). Pools shall be provided with
energy -conserving measures in accordance with Sections
403.9.1 through 403.9.3.
403.9.1 Pool heaters. All pool heaters shall be equipped
with a readily accessible on -off switch to allow shutting off
the beater without adjusting the thermostat setting. Pool
heaters feed by natural gas or LPG shall not have continu-
ously burning pilot lights.
403.9.2 Time switches. Time switches that can automati-
cally turn off and on heaters and pumps according to a preset
schedule shall be installed on swimming pool heaters and
pumps.
Exceptions:
1. Where public health standards require 24 -hour
pump operation.
2. Where pumps are required to operate solar- and
waste -heat -recovery pool heating systems.
403.9.3 Pool covers. Heated pools shall be equipped with a
vapor -retardant pool cover on or at the water surface. Pools
heated to more than 90°F (32°C) shall have a pool cover
with a minimum insulation value of R-12.
Exception: Pools deriving over 60 percent of the energy
for heating from site -recovered energy or solar energy
source.
SECTION 404
ELECTRICAL POWER AND LIGHTING SYSTEMS
404.1 Lighting equipment (Prescriptive). A minimum of 50
percent of the Lamps in permanently installed lighting fixtures
shall be high -efficacy lamps.
SECTION 405
SIMULATED PERFORMANCE ALTERNATIVE
(Performance)
405.1 Scope. This section establishes criteria for compliance
using simulated energy performance analysis. Such analysis
shall include heating, cooling, and service water heating
energy only.
405.2 Mandatory requirements. Compliance with this sec-
tion requires that the mandatory provisions identified in Sec-
tion 401.2 be met. All supply and return ducts not completely
inside the building thermal envelope shall be insulated to a
minimum of R-6.
405.3 Performance -based compliance. Compliance based on
simulated energy performance requires that a proposed resi-
dence (proposed design) be shown to have an annual energy
cost that is less than or equal to the annual energy cost of the
standard reference design. Energy prices shall be taken from a
source approved by the code official, such as the Department of
Energy, Energy Information Administration's State Energy
Price and Expenditure Report. Code officials shall be permit-
ted to require time -of -use pricing in energy cost calculations.
Exception: The energy use based on source energy
expressed in Btu or Btu per square foot of conditioned floor
area shall be permitted to be substituted for the energy cost.
The source energy multiplier for electricity shall be 3.16.
The source energy multiplier for fuels other than electricity
shall be 1.1.
405.4 Documentation.
405.4.1 Compliance software tools. Documentation veri-
fying that the methods and accuracy of the compliance soft-
ware tools conform to the provisions of this section shall be
provided to the code official.
405.4.2 Compliance report. Compliance software tools
shall generate a report that documents that the proposed
design complies with Section 405.3. The compliance docu-
mentation shall include the following information:
1. Address or other identification of the residence;
2. An inspection checklist documenting the building
component characteristics of the proposed design as
listed in Table 405.5.2(1). The inspection checklist
shall show results for both the standard reference
design and the proposed design, and shall document
all inputs entered by the user necessary to reproduce
the results;
3. Name of individual completing the compliance
report; and
32 2009 INTERNATIONAL ENERGY CONSERVATION CODE®
RESIDENTIAL ENERGY EFFICIENCY
4. Name and version of the compliance software tool
Exception: Multiple orientations. When an other-
wise identical building model is offered in multiple
orientations. compliance for any orientation shall
be permitted by documenting that the building
meets the performance requirements in each of the
four cardinal (north, east, south and west) orienta-
tions.
405.4.3 Additional documentation. The code official shall
be permitted to require the following documents:
1. Documentation of the building component character-
istics of the standard reference design.
2. A certification signed by the builder providing the
building component characteristics of the proposed
design as given in Table 405.5.2(1).
3. Documentation of the actual values used in the soft-
ware calculations for the proposed design.
405.5 Calculation procedure.
405.5.1 General. Except as specified by this section, the
standard reference design and proposed design shall be
configured and analyzed using identical methods and tech-
niques.
405.5.2 Residence specifications. The standard reference
design and proposed design shall be configured and ana-
lyzed as specified by Table 405.5.2(1). Table 405.5.2(1)
shall include by reference all notes contained in Table
402.1.1.
405.6 Calculation software tools.
405.6.1 Minimum capabilities. Calculation procedures
used to comply with this section shall be software tools
capable of calculating the annual energy consumption of all
building elements that differ between die standard refer-
ence design and the proposed design and shall include the
following capabilities:
1. Computer generation of the standard reference
design using only the input for the proposed design.
The calculation procedure shall riot allow the user to
directly modify the building component characteris-
tics of the standard reference design.
2. Calculation of whole -building (as a single zone) sizing
for the hearing and cooling equipment in the standard
reference design residence in accordance with Section
M1401.3 of die International Residential Code.
3. Calculations that account for the effects of indoor and
outdoor temperatures and part -load ratios on the per-
formance of healing, ventilating and air-conditioning
equipment based on climate and equipment sizing.
4. Printed code official inspection checklist listing each
of the proposed design component characteristics
from Table 405.5.2(1) determined by the analysis to
provide compliance, along with their respective per-
formance ratings (e.g., R -value, U -factor, SHGC,
HSPF, AFUE, SEER, EF, etc.).
405.6.2 Specific approval. Performance analysis tools
meeting the applicable sections of Section 405 shall be per -
n ittcd to be approved. Tools arc permitted to be approved
based on meeting a specified threshold for a jurisdiction.
The code official shall be permitted to approve tools for a
specified application or limited scope.
405.6.3 Input values. When udetdations require input vat-
ues not specified by Sections 402, 403, 404 and 405, those
input values shall be taken front an approved source.
2009 INTERNATIONAL ENERGY CONSERVATION CODE® 33
RESIDENTIAL ENERGY EFFICIENCY
TABLE 405.5.2(1)
SPECIFICATIONS FOR THE STANDARD REFERENCE AND PROPOSED DESIGNS
BUILDING COMPONENT
STANDARD REFERENCE DESIGN
PROPOSED DESIGN
Type: mass wall if proposed wall is mass; otherwise wood frame.
As proposed
Gross area: same as proposed
As proposed
Above -grade walls
11 -factor: from Table 402.1.3
As proposed
Solar absorptance = 0.75
As proposed
Remittance = 0.90
As proposed
Type: same as proposed
As proposed
Basement and crawl space walls
Gross area: same as proposed
402.1.3, insulation layer
As proposed
U -factor: from Table with on
As proposed
interior side of walls.
Type: wood frame
As proposed
Above -grade floors
G2sS area: same as proposed
As proposed
U -factor: from Table 402.1.3
As proposed
Type: wood frame
As proposed
Ceilings
Gross area: same as proposed
As proposed
U -factor: from Table 402.1.3
As proposed
Type: composition shingle on wood sheathing
As proposed
Roofs
Gross area: same as proposed
As proposed
Solar absorptance = 0.75
As proposed
Emittance = 0.90
As proposed
Attics
Type: vented with aperture = 1 ft2 per 300 fir ceiling area
As proposed _
Type: same as proposed foundation wall area above and below grade
As proposed
Foundations
and soil characteristics: same as proposed.
As proposed
Area: 40 ft2
As proposed
Doors
Orientation: North
As proposed
U -factor: same as fenestration from Table 402.1.3.
As proposed
Total areas =
As proposed
(a) The proposed glazing area; where proposed glazing area is less
than 15% of the conditioned floor area.
(b) 15% of the conditioned floor area; where the proposed glazing
area is 15% or more of the conditioned floor area.
Orientation: equally distributed to four cardinal compass
As proposed
Glazing'
orientations (N, E, S & W).
As proposed
U -factor: from Table 402.1.3
SHGC: From Table 402.1.1 except that for climates with no
As proposed
requirement (NR) SHGC = 0.40 shall be used.
Same as standard reference design
Interior shade fraction:
Summer (all hours when cooling is required) = 0.70
Winter (all hours when heating is required) = 0.85°
External shading: none
As proposed
Skylights
None
As proposed
Thermally isolated sunrooms
None
As proposed
(continued)
34 2009 INTERNATIONAL ENERGY CONSERVATION CODES
RESIDENTIAL ENERGY EFFICIENCY
TABLE 405.5.2(1} --continued
annrIPtfATIONS FOR THE STANDARD REFERENCE AND PROPOSED DESIGNS
BUILDING COMPONENT
STANDARD REFERENCE DESIGN
PROPOSED DESIGN
For residences that are not tested, the
same as the standard reference design.
For residences without mechanical
ventilation that are tested in
accordance with ASHRAE 119,
Section 5.1, the measured air exchange
rate` but not less than 0.35 ACH
For residences with mechanical
Specific leakage area (SLA)d = 0.00036 assuming no energy
ventilation that are tested in
Air exchange rate
recovery,
accordance with ASHRAE 119,
Section 5.1, the measured air
exchange rate' combined with the
mechanical ventilation rate, f which
shall not be less than 0.01 x CFA + 7.5
x (N4, +l)
where:
CFA = conditioned floor area
N5, = number of bedrooms
None, except where mechanical ventilation is specified by the
proposed design, in which case:
Annual vent fan energy use:
Mechanical ventilation
kWh/yr = 0.03942 x CFA + 29.565 x (Ni, +1)
As proposed
where:
CFA = conditioned floor area
Nb,= number of bedrooms
Internal gains
IGain = 17,900 + 23.8 x CFA + 4104 x N,
Same as standard reference design
(Bnilday er dwelling unit)
Same as standard reference design, plus
any additional mass specifically
Internal mass
An internal mass for furniture and contents of 8 pounds per
designed as a thermal storage
square foot of floor area.
elements- r but not integral to the
building envelope or structure
For masonry floor slabs, 80% of floor area covered by R-2
As proposed
carpet and pad, and 20% of floor directly exposed to room
air.
For masonry basement walls, as proposed, but with insulation
Structural mass
required by Table 402.1.3 located on the interior side of the
As proposed
walls
For other walls, for ceilings, floors, and interior walls, wood
frame construction
As proposed
As proposed
Heating systemss•h
Capacity: sized in accordance with Section M1401.3 of the
As proposed
International Residential Code
As proposed
Cooling systemss•'
Capacity: sized in accordance with Section M1401.3 of the
As proposed
International Residential Code
Service water
As proposed
, As proposed
heating" k
Use: same as proposed design
gal/day = 30 + (10 x Nb,)
A thermal distribution system efficiency (USE) of 0.88 shall be
applied to both the heating and cooling system efficiencies
for all systems other than tested duct systems. Duct
As tested or as specified in Table
Thermal distribution systems
insulation: From Section 403.2.1. For tested duct systems, the
405.5.2(2) if not tested
leakage rate shall be the applicable maximum rate from
Section 403.2.2.
Type: Manual, cooling temperature setpoint = 75°F;
Same as standard reference
Thermostat
Heating temperaturesetpoint=72°F
(continued)
2009 INTERNATIONAL ENERGY CONSERVATION C0DE® 35
RESIDENTIAL ENERGY EFFICIENCY
TABLE 405.5.2(1) —continued
For SL I square foot = 0-93 m': I British thermal unit = 10551; 1 pound per square foot = 4.88 kgbar; 1 gallon (U.S.) = 3.785 I.; 'C = (°F -3)/l.8,
I degree = 0.79 rad.
a. Glazing Shall be defined as sunlight-Imasmitting fenestratim. including the area of sash, carbingor other framing elements, that encl osecundi[intted space. Gl az-
ing includes Nearea ofsunlight-ttanamirdng fenestration rusemblics in walls houndingconditionedbasements. Fordoors where thesunlighrlrmemivingnpening
is less than 50 percent of the door area, the glazing area is the sunlight transmitting opening area. For all other doors, the glazing area is the rough frame opening
area for the door including the door and the frame.
b. For residences with conditioned basements, R-2 and R-4 residences and townhouses, the following formula shall be used to determine glazing area;
AF = A, x FA x F
where:
AF = Total glazing area.
A, = Standard reference design total glazing area.
FA = (Above -grade thermal boundary gross wall area)/(above-grade boundary wall area + 0.5 x below -grade boundary wall area).
F = (Above -grade thermal boundary wall area)/(above-grade thermal boundary wait area + common wall area) or 0.56, whichever is greater.
and where:
Thermal boundary wall is any wall that separates conditioned space from unconditioned space or ambient conditions.
Above -grade thermal boundary wall is any thermal boundary wall component not in contact with soil.
Below -grade boundary wall is any thermal boundary wall in soil contact.
Common wall area is the area of walls shared with an adjoining dwelling unit.
c. For fenestrations facing within 15 degrees (0.26md)oftruesouth that are directly coupled to thermal storage mass, the winter interior shade fraction shall be per-
mitted to be increased to 0.95 in the proposed design.
d. Where leakage area (L) is defined in accordance with Section 5.1 of ASHRAE 119 and where:
MA = 1/CFA
where L and CFA are in the same units.
e. Tested envelope leakage shall be determined and documentedby an independent party approved by the code official- Hourly calculations as specified in the 2001
ASHRAE Handbook of Fundamentals, Chapter 26, page 26.21, Equation 40 (Sherman-Grimsrud model) or the equivalent shall be used to determine the energy
loads resulting from infiltration.
f. The combined air exchange rate for infiltration and mechanical ventilation shall be determined in accordance with Equation 43 of 2001 ASHRAE Handbook of
Fundamentals, page 26.24 and the "Whole -house Ventilation" provisions of 2001 ASHRAE Handbook of Fundamentals, page26.19 for intermittent mechanical
ventilation.
g. Thermal storageelurnent shall mean acomponentnot partuftllefloola.wallsoreeilingsthat is panofa passive solar system. andthal provides thermal storage such
ascndosed watercolumns, rwk brds.urphaso-chaage containers, A thermalsmmgeelement must heir thesame room as fenesrration that faces within 15 degrees
(0.26 red) of true south, or must be connected to such a room with pipes or duels that allay the dement to be actively charged.
h. Fore proposeddesigawith multiple healing,coolingor water heating systemsusingdiffuent fuel types, Iheapplicablestandard retcrencedesign system capacities
andfusttypesshelI beweighted in accordance with their rope ilve loads as calculat6dby accepted engineering pramleeforeaeh equipment and fuel typcpresenl.
i. For a proposed design without a proposed heat'gQgaystemI a heating system with One prevailing federal mioimumcfticiencyshall beassumedforboth the standard
reference design and proposed design. Forclectlic heating systems. [he prevailing federal minimum efficiency air -source heat pump shall be used for the standard
reference design, f!
j. For a proposed design home without a proposed cooling system, an electric air conditioner with the prevailing federal minimum efficiency shall be assumed for
both the standard reference design and Iha proposed design.
k. For a proposed design with a nonstorage-type water heater, a 40 -gallon storage -type water heater with the prevailing federal minimum energy factor for the same
fuel as the predominant heating fueltypeshall be assurned.Por theenen of aproposed design without aproposedwaterheater,a 40 -gallon storage -type water heater
with the prevailing federal minimum efficiency for the same fuel as the predominant heating fuel type shall be assumed for both the proposed design and standard
reference design.
TABLE 405.5.2(2)
DEFAULT DISTRIBUTION SYSTEM EFFICIENCIES FOR PROPOSED DESIGNSa
DISTRIBUTION SYSTEM CONFIGURATION AND CONDITION:
FORCED AIR SYSTEMS
HYDRONIC SYSTEMS"
Distribution system components located in unconditioned space
-
0.95
Untested distribution systems entirely located in conditioned space'
0.88
"Ductless" systemsd
I
For ST: I cubic fool per minute =0.47 Us; t square foot = 0.093 m'; I pound par square inch =68951's: I inch water gauge = 1250 Pa.
a. Default values given by this table are for untested distribution systems, which must still meet minimurn requirements for duct system insulation.
b. HydronicsystzmsshalI meanthusesystems thatdistributshearing and cooling cneigydne0lytotndividualspacesusingliquidspunipultlmoughclosedlooppip-
ing and that do not depend on ducted, forced airflow to maintain space temperatures.
c. Entire systemic conditioned space shall mean that no component of the distribution system. including the air handler unit, is located outside of the conditioned
space.
d. Ductless systems shall be allowed to have forced airflow across acoilbut shall nothave any ducted airilowextemal to the manufacturer's air handlerendosure.
36 2009 INTERNATIONAL ENERGY CONSERVATION C0DE®
U.S DEPARTMENrOF EnergyEficiency& BUILDING ENERGY CODES PROGRAM
ENERGY Renewable Energy
Impacts of the 2009 IECC
for Residential Buildings
at State Level
September 2009
BUILDING ENERGY CODES PROGRAM IMPACTS OF THE 2009 IFCC I' OR RLSIDENTIAL BUILDINGS AT STATE LEVEL
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BUILDING ENERGY CODES PROGRAM IMPACTS OFTI IF 2009 IECC FOR RESIDENTIAL BUILDINGS AT STATE LEVEL
Executive Summary
The Building Energy Codes Program (BECP) recently conducted a nationwide residential energy code analysis
for the U.S. Department of Energy (DOE). The analysis compares the requirements of the 2009 International
Energy Conservation Code® (IECC) with the residential code —or typical construction practice in the absence
of a code —in most states as of June 2009. The results, which include estimated typical energy savings of
updating each state's code to the 2009 IECC, are provided in this report in chapters specific to each state.
An overview of the 2009 IECC and its major chapters, as well as a brief comparison to previous versions, is
provided as introductory information. The IECC is then briefly compared to the International Residential Code,
which contains a chapter with energy efficiency requirements that are very similar to the IECC.
Several states have either not adopted a mandatory energy code or developed their own codes which have
minimal or no connection to the IECC. The latter —including California, Florida, Oregon, and Washington —
were not included in this analysis as the codes in these states would be difficult to appropriately compare to the
2009 IECC and most of these states have energy offices that have already assessed the IECC on their own.
Chapter 2 is dedicated to outlining some of the major code differences in the 2009 IECC that are not contained
in any previous version of the code, and to which much of the energy savings of the 2009 IECC compared to
previous versions is attributable. These energy saving differences are described in further detail in the report,
and include:
• Mandatory duct pressure testing coupled with maximum allowable duct leakage rates. These
requirements are applicable when any portion of the ducts are outside the conditioned space.
• A requirement that 50% of lamps in a residence must be energy efficient
• Several improvements in basic envelope requirements
• Elimination of trade-off credits for high efficiency heating, cooling, or water heating equipment.
The full results of each state specific analysis are provided in the following report.)
I DISCLAIMER: The results contained in this report are complete and accurate to the best of BECP's knowledge, based on
information available at the time it was written.
Page left intentionally blank
BUILDING ENERGY CODES PROGRAM IiiPACrs OLDIE 2009 IECC FOR RESIDENTIAL RIIILDINOS AT SrATE LEVEL
1.0 Chapter 1 Overview of the 2009 IECC
1.1 Introduction
This report examines the requirements of the 2009 International Energy Conservation Code® (IECC) on
residential buildings on a state -by -state basis with a separate, stand-alone chapter for each state. A summary of
the requirements of the code is given for each state. The 2009 IECC is then compared to the current state code
for most state'2 or typical current construction practice for the states that do not have a residential energy
efficiency code. Estimated typical energy savings of updating each state's code to the 2009 IECC are reported.
1.2 Overview of the 2009 IECC
The International Energy Conservation Code sets requirements for the "effective use of energy" in all
buildings. Certain buildings that use very low energy use (such as buildings with no heating or cooling)
are exempt. The code applies to new buildings and to remodels, renovations, and additions to buildings.
Table I shows the organization of the 2009 IECC. The IECC has two separate categories of buildings:
residential and commercial. The code requirements are almost entirely different for these two categories.
Residential buildings are essentially defined as low-rise buildings (3 stories or less above grade) intended for
long-term living (hotels/motels are classified as commercial buildings). The requirements for residential
buildings are in Chapter 4; the requirements for commercial buildings are in Chapter 5. Chapters 1 though 3
and Chapter 6 apply to all buildings. This report only addresses the residential portion of the IECC, a separate
report addresses commercial buildings3.
The only chapters of the IECC with specific requirements for residential buildings are Chapter 4 and, to a lesser
extent, Chapter 1 and Chapter 3. Chapter 4 does reference certain commercial building requirements in Chapter
5 (for example, HVAC systems serving multiple dwelling units). Chapters 2 and 6 only provide supporting
information.
Chapter 1 primarily addresses when the code applies and provides instruction to help confirm
compliance with the code.
Table 2 below summarizes the sections in Chapter 1.
Chapter 2 defines terms used in the code.
Chapter 3 provides a U.S. map and tables of the climate zones used in the IECC. Climate zones in the code are
set on county boundaries. These zones are shown in Figure 1. Section 303 specifies information required at the
building site to verify insulation level and specifies National Fenestration Rating Council (NFRC) standards for
2 States with their own home -developed codes are not compared to the IECC in this report. This includes California, Oregon,
Washington, and Florida. This is done for two reasons. First, these states generally have codes that have little resemblance to the
IECC, making a thorough comparison beyond the scope of this study. Second, these states generally have highly capable energy
offices that are capable of assessing the IECC on their own (and often have). Alaska, Hawaii and Vermont also do not have an energy
analysis here because of difficulties in assessing construction practice particular to those states. No energy analysis was conducted for
states that have already adopted the 2009 IECC.
r Many states adopt the ANSI/ASHRAE/IESNA Standard 90.1 for commercial buildings rather than the IECC and therefore 90.1-
2007 is examined for commercial buildings in the separate report. The 2009 IECC permits compliance with Standard 90.1-2007 as
one option for complying with the IECC for commercial buildings.
BUILDING ENERGY CODES PROGRAM IMPACTS OF T IlE 2009 IECC FOR RESIDENTIAL BUILDINGS AT STATE LEVEL
rating fenestration performance. Chapter 3 contains only one element that directly contains a specific
construction requirement: protective covering for insulation on the exterior of foundations (Section 303.2.1).
Table 1. IECC Table of Contents
CHAPTER 1 ADMINISTRATION
101 Scope and General Requirements
102 Alternate Materials —Method of Construction, Design or Insulating Systems
103 Construction Documents
104 Inspections
105 Validity
106 Reference Standards
107 Fees
108 Stop Work Order
109 Board of Appeals
CHAPTER 2 DEFINITIONS
201 General
202 General Definitions
CHAPTER 3 CLIMATE ZONES
301 Climate Zones
302 Design Conditions
303 Materials, Systems and Equipment
CHAPTER 4 RESIDENTIAL ENERGY EFFICIENCY
401 General
402 Building Thermal Envelope
403 Systems
404 Electrical Power and Lighting Systems
405 Simulated Performance Alternative
CHAPTER 5 COMMERCIAL ENERGY EFFICIENCY
501 General
502 Building Envelope Requirements
503 Building Mechanical Systems
504 Service Water Heating
505 Electrical Power and Lighting Systems
506 Total Building Performance
CHAPTER 6 REFERENCED STANDARDS
BUILDING ENERGY CODES PROGRAM IMPACTS or THE 2009 IECC FOR RESIDENTIAL. BUILDINGS NI STATE LEVEL
Table 2. Overview of IECC Chapter 1
Section
Overview/summary
101
Scope and General Requirements
Defines how code applies to additions,
alterations, renovations, and repairs. Exempts
certain low energy buildings.
102
Alternate Materials —Method of
Provides code official leeway in interpreting
Construction, Design or Insulating
requirements.
Systems
103
Construction Documents
Construction documents as required by the
code official must be provided.
104
Inspections
Inspections must be permitted and code
officials must give approval before allowing
further construction or occupancy.
105
Validity
Instructs that remainder of code applies even if
a portion is found to be illegal or void.
106
Referenced Standards
Referenced standards must be complied with;
the IECC takes precedence if there are any
conflicts.
107 Fees
Fees for permits.
108
Stop Work Order
Authority and conditions for stop work orders
109
Board of Appeals
For hearing and deciding appeals.
1.3 Residential Building Requirements — Chapter 4 of the IECC
The 2009 IECC sets construction requirements related to energy efficiency for four energy end -uses:
1) Space heating
2) Space cooling (air conditioning)
3) Water heating
4) Lighting4
Table 3 shows the organization of the IECC requirements in Chapter 4.
Most of the requirements in the IECC are contained in Section 402 for the building envelope (ceilings, walls,
windows, floor/foundation). Figure 1 shows the prescriptive requirements for most envelope measures (there
are also separate requirements for skylights, high mass walls, and steel -framed ceilings, walls, and floors).
" Lighting is new to the scope of the IECC for residential buildings in 2009. Previous editions of the IECC only had requirements for
space heating, space cooling, and water heating.
BUILDING ENERGY CODES PROGRAM IMPACTS OF THE 2009 IECC FOR RESIDENTIAL BUILDINGS AT STATE LEVEL
Table 3. Overview of IECC Chapter 4
Section
Overview/summary
401 General
Identifies the two compliance paths: prescriptive and
performance. Requires a certificate to be posted on the building
listing R -values and other energy efficiency information.
402 Building Thermal Envelope
This section contains most of the prescriptive requirements in
the code. Insulation and fenestration requirements are given by
climate zone. Air sealing requirements.
403 Systems
Contains requirements for heat pump controls, duct testing and
sealing, piping insulation, and equipment sizing.
404 Electrical Power and Lighting
Contains requirements for efficient lighting.
Systems
405 Simulated Performance
The performance approach. This utilizes the requirements of
Alternative
Sections 401 through 404 as a starting point and allows trade-
offs. Unlike previous versions of the IECC this does not give
extra credit for high efficiency heating, cooling, and water
heating equipment. Compliance is determined using computer
software. Allows more flexibility in meeting the code.
Zane 4 moos in
weelem Waahtlglen and degas
m Is mael Tana 51agWremants
AM U AIska I, Zane 7
Bxc.pl ierN Zone 8:n9
eon., NOMwtA Mc4c
Oookgkam Swneat Faib.rM
N.m. N. Slv W MmKe 4rok
North Slope
3 Wass
-13R an
i�aaaaee
llaeeY Gana
�iiJ
tiv Vim _rv4uNs
Figure 1. Prescriptive Envelope requirements
BUILDING ENERGY CODES PROGRAM IMPACTS OF THE 2009 IECC FOR RESIDEJI IAL 13UILowos AT STATE LEVEL
1.4 Comparison to Previous Versions of the IECC
The IECC is typically published every three years, though there are some exceptions. In the last two decades,
full editions of the MEC came out in 1989, 1992, 1993, and 1995, and full editions of the IECC came out in
1998, 2000, 2003, 2006, and 20095.
Though there were changes in each edition of the IECC from the previous one, the IECC can be categorized
into two general eras: 2003 and before, and 2004 and after. This is because the residential portion of the IECC
was heavily revised in 2004. The climate zones were completely revised (reduced from 17 zones to 8 primary
zones in 2004) and the building envelope requirements were restructured into a different format. The code
became much more concise and much simpler to use. These changes complicate comparisons of state codes
based on pre -2004 versions of the IECC to the 2009 IECC.
The IECC also had substantial revisions from 2006 to 2009. These revisions were not to the code format, but
rather were changes to specific requirements to improve energy efficiency and make the code more stringent.
The 2009 has some important new requirements:
• The duct system now has to be tested and the air leakage out of ducts must be kept to an acceptable
maximum level, Testing is not required if all ducts are inside the building envelope (for example in
heated basements), though the ducts still have to be sealed.
• 50% of the lighting "lamps" (bulbs, tubes, etc.) in a building have to be energy efficient. Compact
fluorescents qualify, standard incandescent bulbs do not.
• Trade-off credit can no longer be obtained for high efficiency HVAC equipment. For example, if a high
efficiency furnace is used, no reduction in wall insulation is allowed. This will have a great impact on
reducing the flexibility allowed by the REScheckTM software. No energy impact is assigned to this code
change in the analysis of updating state codes to the 2009 IECC in this report.
• Vertical fenestration U -factor requirements are reduced from 0.75 to 0.65 in Climate Zone 2, 0.65 to 0.5
in Climate Zone 3, and 0.4 to 0.35 in Climate Zone 4.
• The maximum allowable solar heat gain coefficient is reduced from 0.40 to 0.30 in Climate Zones 1, 2,
and 3.
• R-20 walls in climate zones 5 and 6 (increased from R-19)
• Modest basement wall and floor insulation improvements
• R-3 pipe insulation on hydronic distribution systems (increased from R-2)
• Limitation on opaque door exemption both size and style (side hinged)
• Improved air -sealing language
• Controls for driveway/sidewalk snow melting systems
• Pool covers are required for heated pools.
1.5 The IECC Compared to the International Residential Code (IRC)
Chapter II of the IRC contains energy efficiency requirements that are very similar to the IECC. This Chapter
allows compliance with the IECC as an option for IRC compliance. The scope of the IRC is limited to one- and
two-family dwellings and to townhouses, whereas the IECC includes other low-rise multifamily buildings such
'There was also a published version of the IECC in 2004, but that version is referred to as a "supplement" edition.
BUILDING ENERGY CODES PROGRAM IMPACTS or Ti IF 2009 I FCC FOR RESIDENTIAL BUILDINGS AT STATE LEVEL
as apartments. States can adopt the IRC, the IECC, or both. While nearly all the requirements in the IRC are
identical to those in the IECC, there are a few differences between the 2009 IECC and 2009 IRC. Most notably:
• The IRC requires 0.35 solar heat gain coefficient (SHGC) glazing in Climate Zones 1-3, the IECC
requires 0.30 SHGC. Impact resistant fenestration in Climate Zones 2 and 3 is allowed to have an
SHGC of up to 0.40 in the IRC only.
• The IECC has higher basement wall and floor insulation levels in colder zones.
• The IRC has no "mandatory" (cannot be traded off) requirements related to fenestration U -factor or
SHGC, the IECC does.
• Compliance with the IECC is allowed as an alternative to Chapter 11 of the IRC. The IRC does not
directly contain a simulated performance alternative; the IECC must be used instead for this compliance
alternative.
Because of these changes, the 2009 IRC does not achieve equivalent energy savings to the 2009 IECC.
1.6 Current State Codes
This report addresses each state code individually, but a brief summary of state codes is presented here. Almost
40 states have adopted the IECC or its predecessor, the Model Energy Code (MEC), as their mandatory state
code. Many of these states have made some modifications or amendments to the IECC or MEC. These
modifications can vary from a few minor changes to extensive revisions.
Some states have no mandatory codes. As of the date of this report, these states are:
•
Alabama
•
Hawaii
•
Kansas
•
Mississippi
•
Missouri
•
North Dakota
•
South Dakota
•
Wyoming
Four states have developed their own codes that have minimal or no connection to the IECC:
• California
• Florida
• Oregon
• Washington
In certain cases, cities or counties within a state have a different code from the rest of the state. For example,
Austin and Houston have adopted progressive energy codes that exceed the minimum Texas statewide code.
BUILDING ENERGY CODES PROGRAM I MPACrs of n u: 2009IECC FOR REST DENTIAL RuII.rn Ncs AF S I A I -E LEVEL
2.0 Chapter 2 — Energy Analysis of Major Improvement in 2009 IECC
The 2009 IECC contains major differences that are not contained in any previous version of the IECC. These
changes account for much of the energy savings attributable to the 2009 IECC compared to any of the older
versions of the IECC.
2.1 Duct Testing
Section 403.2.2 of the 2009 IECC requires air ducts systems, where any of the ducts pass outside of the
conditioned space (into attics, garages, etc.), to be pressure tested for leakage with maximum leakage rates
specified. The duct system now has to be tested to prove that the air leakage out of ducts is kept to an
acceptable level. Testing is not required if all ducts are inside the building envelope (for example in heated
basements), though all ducts are required to be sealed.
The IECC has always required ducts to be sealed. However, multiple studies have shown that visual inspection
of ducts is not adequate. Ducts are often located in difficult to access areas such as attics and crawl spaces.
Cracks and other leakage points in ducts may not be visible because they are covered by insulation, hidden from
view, or simply too small to be readily apparent to the human eye. Testing of completed homes in Washington
state, where prescriptive code requirements for duct sealing apply, "showed no significant improvement" over
non -code homes (Washington State University 2001). Another study from Washington state concluded:
"Comparisons to air leakage rates reported elsewhere for homes built before the implementation of the 1991
WSEC show no significant improvement by the general population" despite years of training emphasizing duct
sealing (Hales et al. 2003). The requirement to meet a specific leakage limit will result in improving the
buildings that would have had the leakiest ducts. Figure 2 illustrates this effect.
Numerous other studies around the nation show substantial duct leakage in new homes, including those in states
with codes requiring duct sealing. For example, a 2001 study of 186 houses built under the MEC in
Massachusetts reported "serious problems were found in the quality of duct sealing in about 80% of these
houses" (Xenergy 2001). Pressurization tests in 22 of these houses found an average leakage to the outside of
the house of 183 efm, or 21.6% of the system flow, at a pressure of 25 Pascals.
The IECC allows a variety of compliance methods. Notably, the testing can be done at rough -in stage
immediately after the ducts are installed. This allows potentially costly call backs to be avoided if the tested
leakage rate exceeds code requirements.
BUILDING ENERGY CODES PROGRAM IMIACI S or THE 2009 IECC FOR RESIDENTIAL BUILDINGS AT STATE LEVEL
e 5
r
c
e
n
4
t
0 3
f
h z
0
u
Si
e
0 10 20 30 40 50 00
Duct Leakage Percentage
Figure 2. Impact of improved duct sealing. The curve illustrates the approximate distribution of leakage rate in
new homes. The arrows show the reduction in duct leakage necessary to meet the code requirement
2.2 Lighting
The 2009 IECC requires 50% of lamps (bulbs, tubes) within a residence to be energy efficient. There were no
requirements for lighting in single-family homes in previous versions of the IECC. This includes but is not
limited to CFLs. Standard incandescent bulbs do not qualify. Savings attributable to the lighting requirements
in the IECC will decrease as Federal law requires improved light bulbs in 2012 to 2014.
2.3 Envelope Improvements
The 2009 IECC has a number of improvements in basic envelope requirements over the 2006 IECC. Allowable
glazed fenestration (windows and skylights) SHGC has been reduced to a maximum of 0.30, meaning that no
more than 30% of the sun's heat can pass through the window into the home. Fenestration U -factor
requirements have improved in Climate Zones 2, 3, and 4. Wall insulation for wood frame walls has been
bumped up from R-19 to R-20 in Climate Zones 5 and 6. Floor insulation and basement wall insulation have
increased in the very coldest zones.
2.4 Elimination of Equipment Trade-offs
Previous versions of the IECC allow reductions in envelope measures to below -code levels if heating and
cooling equipment efficiency is improved to above -code levels. For example, a popular trade-off in colder
climates is to use a high efficiency gas furnace allowing a reduction of wall insulation. The 2009 IECC
eliminates these types of trade-offs. Since these trade-offs are by definition energy neutral, their eliminiation in
theory would not impact energy use. However, building envelope measures often have longer lifetimes than
heating and cooling equipment so there can be long-term impacts. Additionally, there is expected to be some
"free rider" effect where high efficiency equipment will be used regardless of the IECC requirements and the
trade-offs, so the older IECC allowed envelope reductions as an unintended side effect.
BUILDING ENERGY CODES PROGRAM IMPACTS OF THE 2009 IECC FOR RESIDENI AT. BUILDINGS AT STATE LLVEL
3.0 References
Washington State University. 2001. Washington State Energy Code Duct Leakage Study Report.
WSUCEEP01105. Washington State University Cooperative Extension Energy Program, Olympia,
Washington.
Hales, D., A. Gordon, and M. Lubliner. 2003. 2003. Duct Leakage in New Washington State Residences:
Findings and Conclusions. ASHRAE transactions. KC -2003-1-3.
Hammon, R. W., and M. P. Modera. 1999. "Improving the Efficiency of Air Distribution Systems in New
California Homes -Updated Report." Consol. Stockton, California.
ham://www.enerev.ca.gov/title24/ducttape/documents/IMPROVE EFFICIENCY RES.PDF
Journal of Light Construction. April 2003. "Pressure -Testing Ductwork." Michael Uniacke.
Sherman et al. 2004. Instrumented HERS and Commissioning.
http://www.energy.ca.gov/pier/final project reports/500-04-012.html
Xenergy. 2001. Impact Analysis Of The Massachusetts 1998 Residential Energy Code Revisions.
http://www.rnass.gpy/eops/docsfdps/it�7in F bbrs impact analysis fnal.pdf
BUILDING ENERGY CODES PROGRAM
The
U.S. Department of Energy's Building Energy Codes
LLB' Program is an information resource on national model
energy codes. We work with other government agencies, state and
local jurisdictions, national code organizations, and industry to promote
stronger building energy codes and help states adopt, implement,
and enforce those codes.
BECP Website:
www.energycodes.gov
BECP Technical Support:
techsupport@becp.pnl.gov
www.e n ergyco des.g ovf s u ppo rtlh elpd es k. ph p
EERE Information Center
1-877-EERE-INF (1-877-337-3463)
www.eere.energy.gov/informationcenter
U.S. DEPARTMENT OF Energy Efficiency &
ENERGY Renewable Energy
PNNL-18545 - September 2009
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wastepaper including 10% post consumer waste.
ENERG.a. Energy Efficiency & BUILDING ENERGY CODES PROGRAM
Y Renewable Energy
Impacts of the 2009 IECC
on Residential Buildings
in Arkansas
September 2009
BUILDING ENERGY CODES PROGRAM IMPACTS OF THE 2009 IFCC FOR RESIDENTIAL BUILDINGS IN ARKANSAS
DISCLAIMER
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(912003)
BUILDING ENERGY CODES PROGRAM IMPACTS OF THE 2009 IECC FOR RESIDENTIAL BUILDINGS IN ARKANSAS
Analysis of 2009 International Energy Conservation Code
Requirements for Residential Buildings in Arkansas
Summary
The 2009 International Energy Conservation Code (IECC) contains several major improvements in energy
efficiency over the current state code, the 2003 IECC with amendments. The most notable changes are
improved duct sealing and efficient lighting requirements. A limited analysis of these changes resulted in
estimated savings of $242 to $245 a year for an average new house at recent fuel prices.
Overview of the 2009 IECC
The IECC scope includes residential single-family housing and multifamily housing three stories or less above -
grade intended for permanent living (hotel/motel is not "residential"). The code applies to new buildings and
additions/alterations/renovations/ repairs.
The map below shows the primary building envelope requirements for all residential buildings in the 2009
IECC.
Notable requirements in the 2009 IECC:
• Building envelope must be caulked and sealed.
• Slab -on -grade insulation is R-10 to a depth of 2 feet in Zone 4. Insulation is not required for slab -on -
grade foundations in Zone 3.
• Supply ducts in attics must be insulated to R-8. Return ducts in attics and all ducts in crawlspaces,
unheated basements, garages, or otherwise outside building envelope must be insulated to R-6.
BUILDING ENERGY CODES PROGRAM IMPACTS OF THE 2009 IECC FOR RESIDENTIAL BUILDINGS IN ARKANSAS
• All ducts must be sealed and either:
o verified by pressure testing— the duct system has to be tested and the air leakage out of ducts must
be kept to an acceptable maximum level.
o installed entirely within the building thermal envelope — testing is not required if all ducts are inside
the building thermal envelope (for example in heated basements), though the ducts still have to be
sealed.
• Piping for hydronic (boiler) heating systems must be insulated to R-3.
• Although vapor retarders are not required by the IECC, the 1 -codes do set wall vapor retarder
requirements in Section R601.3 of the 2009 IRC. However, vapor retarders are not required in
Arkansas.
• Less insulation is allowed for mass walls and more insulation is required for steel framing.
• 50% of the lighting "lamps" (bulbs, tubes, etc.) in a building must be high efficacy. Compact
fluorescents qualify, standard incandescent bulbs do not. Standard 1 -code administrative requirements
(inspections, documentation) apply.
• A certificate must be posted near the electrical panel listing insulation levels and other energy efficiency
measures.
Exemptions/Allowances from prescriptive measures:
• One door and l5 ft2 of window area are exempt
• Skylight U -factors are allowed to be U-0.65 in Zone 3 and U-0,60 in Zone 4
• 500 ft2 or 20% of ceiling area of cathedral ceiling, whichever is less, is allowed to have R-30 insulation
Mandatory Requirements:
Windows can never exceed an area -weighted U -factor of 0.48 in Zone 4 and cannot exceed an area -weighted
SHGC of 0.50 in Zone 3. The 2009 IECC also identifies a set of other requirements that are strictly
"mandatory" that must be done in all buildings, such as building envelope and duct sealing.
Compliance Paths
The IECC effectively contains three alternative compliance paths.
I) Prescriptive measures. This is considered the simplest path. These requirements do not vary by
building size, shape, window area, or other features. The IECC has a single table of requirements for
insulation R -values and window and door U -factors and SHGC. There is a corresponding U -factor table
that permits compliance of less common component types (e.g., structural insulated panels), albeit
without any cross -component trade-offs.
2) Total building envelope VA (U -factor multiplied by area). This is the path predominantly used by the
REScheckTM software. Based on the prescriptive U -factor table, it allows trade-offs whereby some
energy efficiency measures can fall below code requirements if balanced by other measures that exceed
code requirements.
3) Simulated performance (requires software programs). This path allows compliance if the home has a
calculated annual energy consumption (or energy cost) equal to or less than that of a standard reference
design that just meets the code's prescriptive requirements. This path allows for crediting energy
efficiency measures not accounted for in the other paths, such as renewable energy measures. The 2009
performance path differs from previous editions of the IECC in that it allows no tradeoff credit for the
use of high efficiency space heating, space cooling, or water heating equipment.
BUILDING ENERGY CODES PROGRAM IMPACTS OF THE 2009 IECC FOR RESIDENTIAL BUILDINGS IN ARKANSAS
Main Difference between the Current Arkansas Code and the 2009 IECC
Arkansas has adopted the 2003 IECC with amendments, including:
• No glazed fenestration SHGC requirement. The 2003 [ECC requires a maximum SHGC of 0.40 in
south and central Arkansas.
• Duct insulation is set to R-5.6. The 2003 IECC duct insulation values vary from R-2 to R-8.
Major differences between the 2009 IECC and the Arkansas code are listed below:
• The current state code requires ducts to be sealed but not to a specific leakage rate verified by testing as
is required in the 2009 IECC (if any ducts are outside the building envelope).
• 50% of the lighting "lamps" (bulbs, tubes, etc.) in a building have to be high efficacy in the 2009 IECC;
the 2003 [ECC has no lighting requirement. Compact fluorescents qualify, standard incandescent bulbs
do not.
• Trade-off credit can no longer be obtained for high efficiency HVAC equipment in the 2009 IECC. For
example, if a high efficiency furnace is used, no reduction in wall insulation is allowed. (This will have
a substantial impact on the flexibility allowed by the REScheckTM software and other energy
performance analysis tools.)
• The format of the 2003 IECC and 2009 IECC are substantially different. The 2009 IECC has new
climate zones that cover larger geographic regions than the zones in the 2003 IECC. The envelope
insulation and window requirements in the 2003 IECC vary by window -to -wall area percentage, but not
in the 2009 IECC. This change in format makes a simple comparison of the envelope requirements in
the two codes impossible.
Energy Analysis
A brief energy analysis was conducted comparing the current state code to the 2009 IECC. The
EnergyGaugeTM software was used to determine the energy impacts of changes in envelope requirements.
EnergyGaugeTM is based on the DOE -2 energy simulation software developed by DOE (Lawrence Berkeley
National Laboratory 1981).
Two sets of buildings were simulated: one with energy efficiency levels set to the prescriptive requirements of
the current state code, and one with energy efficiency levels set to the prescriptive requirements of the 2009
IECC. All inputs other than the changes in energy efficiency levels were identical in the two sets of
simulations.
The analysis assumed a two-story, single-family house with a conditioned floor area of 2,400 ft2. It was
assumed that the house had 8.5 -ft high ceilings, a ceiling area (bordering the unconditioned attic) of 1,200 ft2, a
gross exterior wall area of 2,380 ft2, and a window area of 357 ft2 (15% of the wall area) equally oriented north,
south, east, and west. Heating with a natural gas furnace ($ 1.20/therm) and central electric air conditioning
($.12/kWh) were assumed.
High -efficacy lighting was assumed to increase from 10% to 50% of all lighting within the building, reducing
lighting energy use by 26%, or $74 a year. Savings attributable to the lighting requirements in the IECC will
decrease as Federal law requires improved light bulbs in 2012 to 2014. Improved duct sealing was assumed to
save 10% of the heating and cooling costs. Actual savings will vary depending on many factors, including how
well ducts are currently sealed in the absence of any testing requirements.
BUILDING ENERGY CODES PROGRAM IMPACTS OF THE 2009 IECC FOR RESIDENTIAL BUILDINGS IN ARKANSAS
Table I shows the estimated annual energy savings per house that result from meeting the improved
requirements in the 2009 IECC. Total savings includes heating, cooling, and lighting and is shown as a
percentage of the end -uses covered by the 2009 IECC (heating, cooling and water heating).
Table 1. Energy End Use and Percentage Savings
Annual Energy Cost (S)
Savings
2009 IECC vs.
Arkansas Code
2009 IECC
Climate Zone
Arkansas Code
Heating
Cooling
Heating.
Cooling
•Savings' `
Percent
$Iye.
Savings
Little Rock
CZ 3A
965
300
853
244
242
15
Springfield
MO CZ 4A
1185
213
1034
193
245
14
BUILDING ENERGY CODES PROGRAM
J^l The U.S. Department of Energy's Building Energy Codes
Program is an information resource on national model
energy codes. We work with other government agencies, state and
local jurisdictions, national code organizations, and industry to promote
stronger building energy codes and help states adopt, implement,
and enforce those codes.
BECP Website:
www.energycodes.gov
BECP Technical Support:
techsupport@becp.pnl.gov
www.energycodes.govlsu pportlhel pdesk.ph p
SERE Information Center
1-877-EERE-INF F (1-877-337-3463)
www. eere.en ergy.govli nformationcenter
U.S. DEPARTMENT OF Energy Efficiency &
ENERGY Renewable Energy
PNNL-18545 • September2009
Printed with a renewable -source ink on paper containing at least 50%
wastepaper, including 10% post -consumer waste.
ORDINANCE NO.
AN ORDINANCE TO AMEND §173.08 ARKANSAS ENERGY
CODE OF THE BUILDING REGULATIONS CHAPTER OF
THE U.D.C. TO ADOPT THE 2009 RESIDENTIAL
INTERNATIONAL ENERGY EFFICIENCY CODE, WITH
AMENDMENTS HEREIN,
WHEREAS, Fayetteville customers spend over $50 million annually for electricity and
natural gas services; and
WHEREAS, more efficient buildings can conserve energy, reduce stress on our
electricity grid and natural gas supplies while saving money and resources for our citizens; and
WHEREAS, improved building codes emphasizing energy conservation can reduce
future energy consumption and the costs associated with energy production; and
WHEREAS, the existing State adopted and aded 2003 International Energy
Efficiency Code is inferior in comparison with the 2009 International Energy Efficiency Code;
NOW, THEREFORE, BE IT ORDAINED BY THE CITY COUNCIL OF THE
CITY OF FAYETTEVILLE, ARKANSAS:
Section 1. That the City Council of the City of Fayetteville, Arkansas hereby repeals
§173.08 Arkansas Energy Code of the Unified Development Code and enacts a replacement
§173.08 Energy''Efficiency Code as shown below:
"173.08 Energy Efficiency Code
(A) Coinmercicd. The Arkansas Energy Code, its Rules and Regulations as ado tied
and promulgated by the Arkansas Energy Office, and as may from time to time
hereafter may be amended, is hereby adopted by reference pursuant to A.C.A. §
14-55-206 and § 14-55-207. i
(B) Residential. The 2009 International Energy Efficiency Code (IECC) is hereby
adopted by reference for all new residential structures.
(1) The 2009 IECC is hereby amended by adding a provision requiring a Home
Energy Rating (HERS) for new home construction: The City of Fayetteville
requires that all new residential construction have a Home Energy Rating
(HERS) completed by an independent RESNET certified home energy rater,
or equivalent, prior to the issuance of a Certificate of Occupancy. Residential
developments that utilize the exact same floor plan multiple times are required
to have a HERS completed on a minimum of 20% of the residential units.
(2) A sticker shall be posted in a very prominent location near the front door
showing the estimated monthly u)i1ity cost until the home is sold.
(3) All additions, alterations, renovations or repairs to existing residential
structures shall comply with -the standards of the 2009 IECC, but shall not be
required to provide a HERS or post a sticker. Where it is shown to be
impractical to meet the 2009 IECC, the Building Official may consider
permitting additions, alterations, renovations or repairs in compliance with the
Arkansas Energy Code, its Rules and Regulations as adopted and promulgated
by the Arkansas Energy Office, andas may from time to time hereafter may
he amended."
Section 2. That in order to adequately prepare the residential construction industry for the
new requirement for a Home Energy Rating (HERS) for new, home construction, the effective
date for subsections 173.08 (B)(1) and (2) shall be January 01, 2013.
PASSED and APPROVED this day of , 2012.
APPROVED: ATTEST:
By: % By:
LIONELD JORDAN, Mayor SONDRA E. SMITH, City Clerk/Treasurer
NORTHWEST ARKANSAS DEMOCRAT'GAZETE
NORTHWESTARKANSAS THE MORNING NEWS OF SPRINGDALE
THE NORTHWEST
NBVSPMERSLLCRNING NEWS OF ROGERS
liMES
BENTON COUNTY AILYRECO D
212 NORTH EASTAVENUE, FAYETTEVILLE, ARKANSAS 72701 I P.O. BOX 1607, 727021 47&442-17001 WWW.NWANEWS.COM
RECEIVED
AFFIDAVIT OF PUBLICATION
JUL 032012
I, Karen Caler, do solemnly swear that I am the Legal Clerk of the CITY OF FAYETTEVILLE
Northwest Arkansas Newspapers, LLC, printed and published in CITY CLERKS OFFICE
Washington and Benton County, Arkansas, bona fide circulation,
that from my own personal knowledge and reference to the files
of said publication, the advertisement of:
City of Fayetteville
Notice of Proposed Adoption
Was inserted in the Regular Editions on:
July 2, 2012
Publication Charges: $ 78.00
cti..i CcC
Karen Caler
Subscribed and sworn to before me
This 'I dayoftc�. , 2012.
Notary Public
My Commission Expires: 243ot2oItP
5 �g
tAIHYJ,WI_ES
8enron Count
My Cornmsso0 Expires
Sebruary 20, 20i'
**NOTE**
Please do not pay from Affidavit. Invoice will be sent.
NORTHWEST ARKANSAS DEMOCRATIGAZETTE
NORTHWEST ARKANSAS
THE MORNING NEWS OF SPRINGDALE
�SPAPERSLLC
THE NG TMOF RS
NORTHWEST ARKANSAS TIMES
BENTON COUNTY DAILY RECORD
212 NORTH EAST AVENUE, FAYETTEVILLE, ARKANSAS 72701 1 P.O. BOX 1607, 72702 1 479442-1700 1 WWW.NWANEWS.COM
r�7_\•I E13:24 J: Nl;�IT[L I)OI
I, Karen Caler, do solemnly swear that I am the Legal Clerk of the
Northwest Arkansas Newspapers, LLC, printed and published in
Washington and Benton County, Arkansas, bona fide circulation,
that from my own personal knowledge and reference to the files
of said publication, the advertisement of:
City of Fayetteville
Ordinance 5512
Was inserted in the Regular Editions on:
July 26, 2012
Publication Charges: $ 317.76
Subscribed and sworn to before me
This '7.' day of , 2012.
Notary Public
My Commission Expires: 7(to (2 (
CATHY J. WILES
BeMonCountysion
�K MyFebruary 20, 20 Expires
**NOTE**
Please do not pay from Affidavit. Invoice will be sent.
RECEIVED
JUL 262012
CITY OF
FAYETTEVILLE
ORDINANCE NO. 5512
AR ORDINANCE AMEND §17a08
TH �� %i
ARKANSAS DING ENERGY CODE V 11
BUILDING REGULATIONS CHAPTER OF THE 1 ARKANSAS
UDD.C. TO ADOPT THE 2009 INTERNATIONAL ENERGY CONSERVATION CODE, FOR
RESIDENTIAL STRUCTURES, WITH AMENDMENTS HEREIN.
RECEIVED
JUL 2 6 2012
CITY
ITTY OF OFFICE
WHEREAS, Fayetteville customers spend over $50 million annually for electricity
and natural gas services; and
more efficient buildings can conserve energy, reduce stress on our
d and natural gas supplies while saving money and resources for our
citizens; and
WHEREAS, improved building codes emphasking energy conservation can reduce
future energy consumption and the costs associated with energy production; and
WHEREAS, the existing State adopted and amended 2003 International Energy
Conservation Code is inferior in comparison with the 2009 International Energy
Conservation Code; and
WHEREAS, pursuant to A.C.A §14-55-206 and 207, the City of Fayetteville has
published notice in the Northwest Arkansas Times that the City Council will consider
enacting an ordinance to adopt and require all new residential construction and
renovations to comply with the 2009 International Energy Conservation Code, three
copies of which are available for public inspection and review in the Fayetteville City
Clerk's Office.
NOW, THEREFORE, BE IT ORDAINED BY THE CITY COUNCIL OF THE CITY
OF FAYETTEVILLE, ARKANSAS:
Section 1. That the City Council of the City of Fayetteville, Arkansas hereby repeals
§173.08 Arkansas Energy Code of the Unified Development Code and enacts a
replacement §173.08 Energy Conservation Code as shown below:
'§173.08 Energy Conservation Code
(A) Commercial. The Arkansas Energy Code, its Rules and Regulations as
adopted and promulgated by the Arkansas Energy Office, and as from time to
time hereafter may be amended, is hereby adopted by reference pursuant to
A.C.A. § 14-55-206 and § 14-55-207.
(B) Residential. The 2009 International Energy Conservation Code (IECC) is
hereby adopted by reference for all new residential structures with the excep-
tion of §107 Fees and §109 Board of Appeals.
(1) New residential construction.
The 2009 IECC is hereby amended by adding a provision requiring a
Home Energy Rating System(HERS) Index rating for new residential
construction. The City of Fayetteville requires that all new residential con-
struction have a Home Energy Rating System (HERS) Index rating com-
pleted by an independent RESNET certified home energy rater, or equiv-
alent, prior to the issuance of a Certificate of Occupancy. Residential
• developments that utilize the exact same floor plan multiple times are
required to have a HERS Index rating completed on a minimum of 20%
of the residential units.
12) Sticker
A sticker provided by the city shall be posted in a very visible location
near the front entrance to the residential structure indicating the esti-
mated monthly utility cost as derived from the HERS Index rating until
the structure is sold, or for at least 90 days, whichever is less.
(3) Additions, Alteration add renovations
All additions, alterations and renovations to existing residential structures
shall comply with the standards of the 2009 IECC, but shall not be
required to provide a HERS Index rating or post a sticker. Where it is
shown to be impractical to meet the 2009 IECC, the Building Official may
permit additions to comply with the Arkansas Energy Code, its Rules and
Regulations as adopted and promulgated by the Arkansas Energy Office,
and as from time to time hereafter may be amended."
(4) Repairs.
All repairs to existing residential structures and mechanical systems need
only be constructed to at least the same energy conservation standard
as the damaged structure or mechanical system which needed repair
unless a higher standard is required by the Arkansas Energy Code.
(5) Fees.
§107 Fees of the IECC is removed to reflect that only the City Council
can set required fees and any refund policy, the "code official" cannot
set lees nor a refund policy. All fees shall be as prescribed in the Unified
Development Code.
(6) APPeals
§109 Board of Appeals shall be removed from the IECC and have no
force or application. Appeals of the Building Official's interpretation of
this International Energy Conservation Code shall be heard by the exist-
ing Board of Construction Appeals and no new Board of Appeals for
interpreting the International Energy Conservation Code shall be created
by this Code.
RECEIVED
JUL 2 6 2012
CITY
ITTY OF
OFFICE