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Document type: State-specific
Publication Date:
Page Focus: Adoption

780 CMR: MASSACHUSETTS AMENDMENTS TO THE INTERNATIONAL BUILDING CODE 2009: Buildings in the state of Massachusetts shall be designed and constructed in accordance with the 2009 International Energy Conservation Code with Massachusetts Amendments as described in this document:.

Document type: State-specific
Publication Date: July 2013
Page Focus: Adoption

The Massachusetts Board of Building Regulations and Standards (BBRS) in consultation with the Deparment of Energy Resources has amended the Massachusetts statewide building code in line with the recommendations of the Department of Energy on the following occasions:

On October 17, 2008, the ASHRAE Standard 90.1-2007 was adopted as chapter thirteen of the amended Massachusetts seventh edition building energy code.

On Jauary 1, 2010, the IECC 2009 was adopted and by direct reference the ASHRAE Standards 90.1-2007 was maintained in the amended Massachusetts seventh edition building energy code.

 

Document type: Code Notes
Publication Date: October 2011
Page Focus: Compliance

ASHRAE Standard 90.1-2010 and the commercial provisions of the 2012 International Energy Conservation Code require that the building envelope be carefully designed to limit uncontrolled air leakage into and out of the building.

Document type: Reports and Studies
Publication Date: August 2015
Page Focus: Code Development, Residential

This document lays out the U.S. Department of Energy’s (DOE’s) methodology for evaluating the cost-effectiveness of energy code and standard proposals and editions. The evaluation is applied to new provisions or editions of ANSI/ASHRAE/IES Standard 90.1 and the International Energy Conservation Code. The methodology follows standard life-cycle cost (LCC) economic analysis procedures. Cost-effectiveness evaluation requires three steps: 1) evaluating the energy and energy cost savings of code changes, 2) evaluating the incremental and replacement costs related to the changes, and 3) determining the cost-effectiveness of energy code changes based on those costs and savings over time.

This document was originally published in January, 2015. Revision 1 was published in August, 2015, and is available at: commercial_methodology.pdf.

Document type: Reports and Studies
Publication Date: April 2012
Page Focus: Code Development

The U.S. Department of Energy's (DOE's) Building Energy Codes Program has developed and established a methodology for evaluating the energy and economic performance of residential energy codes. This methodology serves two primary purposes. First, as DOE participates in the consensus processes of the International Code Council, the methodology described herein will be used by DOE to ensure that its proposals are both energy efficient and cost effective. Second, when a new version of the International Energy Conservation Code is published, DOE will evaluate the new code as a whole to establish expected energy savings and cost effectiveness, which will help states and local jurisdictions interested in adopting the new codes. DOE's measure of cost-effectiveness balances longer-term energy savings against additions to initial costs through a life-cycle cost perspective.

2015 Revision to this document was posted August 12, 2015. This document is an update to the U...

Document type: State-specific
Publication Date: November 2010
Page Focus: Adoption

Rules governing the energy efficiency for the design and construction of buildings and structures, not including residential buildings, shall be those contained in the 2009 International Energy Conservation Code (IECC), section 501.1 and ASHRAE Standard 90.1-2007, including appendices A, B, C, and D. With the amendments noted, Section 501.1 of the IECC and ASHRAE Standard 90.1-2007 are adopted in these rules by reference.

Document type: State-specific
Publication Date: July 2013
Page Focus: Adoption

The State of Michigan adopted the 2009 International Energy Conservation Code for residential construction, which became effective March 9, 2011.

The State of Michigan adopted the ASHRAE 90.1-2007 standard for commercial construction, which became effective March 9, 2011.

Document type: State-specific
Publication Date: July 2013
Page Focus: Adoption

In compliance with Title III of the Energy Conservation and Production Act (ECPA) of 1976, as amended, this is to certify that the State of Mississippi has adopted teh ASHRAE Standard 90.1-2010 for non-residential buildings.

Document type: State-specific
Publication Date: July 2013
Page Focus: Adoption

In reference to Title III of the Energy Conservation and Production Act (ECPA) of 1976, as amended, this letter serves to certify the State of Mississippi's request for an extension of time to adopt a residential energy code which is equivalent to the 2009 version of the International Energy Conservation Code for low-rise residential buildings.

Document type: State-specific
Publication Date: April 2019
Page Focus: Compliance

A research project in the state of Montana identified opportunities to reduce homeowner utility bills in residential single-family new construction by increasing compliance with the state energy code. The study was initiated in May 2018; data collection began in June 2018 and continued through September 2018. Analysis of the data has led to a better understanding of the energy features present in homes and identified nearly $192,000 in potential annual savings to Montana homeowners that could result from increased compliance with the Montana Residential Energy Code

Document type: Model Data
Publication Date: April 2011
Page Focus: Code Development

This speadsheet provides a summary of the percentage of energy savings with plug loads for the ASHRAE Standard 90.1 Prototype Building Models.

Document type: Analysis
Publication Date: June 2015
Page Focus: Code Development

This analysis focuses on one- and two-family dwellings, townhomes, and low-rise multifamily residential buildings based on the International Energy Conservation Code (IECC). PNNL evaluated the cost-effectiveness of the changes in the prescriptive and mandatory residential provisions of the 2015 edition of the IECC, hereafter referred to as the 2015 IECC, compared to those in the 2012 and 2009 IECC. The current analysis builds on the PNNL technical report titled 2015 IECC: Energy Savings Analysis (Mendon et al. 2015) which identified the prescriptive and mandatory changes introduced by the 2015 IECC compared to the 2012 IECC and determined their energy savings impact.

Document type: Reports and Studies
Publication Date:
Page Focus: Code Development

More than 200,000 homes are factory built in the United States each year to the federally preemptive Manufactured Housing Construction and Safety Standards, mandated by the U.S. Department of Housing and Urban Development (HUD). This paper analyzes national energy use and savings potential from improvements to thermal distribution system efficiency, thermal envelopes, and heating, ventilation and air conditioning (HVAC) equipment over what is currently required by HUD code. Estimated energy savings over current HUD code are provided for four cases: National Fire Protection Association Standard 501-2005, the 2006 International Energy Conservation Code, the U.S. Environmental Protection Agency’s ENERGY STAR manufactured housing guidelines , and Best Practice, based on the U.S. Department of Energy’s Building America Industrialized Housing Partnership program home built in the Pacific Northwest. Savings estimates are also provided from improved HVAC system efficiencies, such as using...

Document type: State-specific
Publication Date:
Page Focus: Adoption

In compliance with Title III of the Energy Conservation and Production Act (ECPA) of 1976, as amended, this letter is to certify that the State of Nebraska has updated the Nebraska Enery Code, which references the 2009 version of the International Energy Conservation Code, as well as ASHRAE Standard 90.1-2007 for non-residential buildings.

Document type: State-specific
Publication Date: September 2012
Page Focus: Compliance, Enforcement

This Guide is designed to assist state and local code jurisdictions in achieving statewide compliance with the 2009 International Energy Conservation ...

Document type: State-specific
Publication Date: June 2013
Page Focus: Adoption

In response to the U.S. Department of Energy's July 20, 2011 notice of determination in the Federal Register regarding ANSI/ASHRAE/IESNA 90.1-2007, the State of Nevada certifies that it has reviewed the provisions of Nevada's building energy codes and has adopted the 2009 International Energy Conservation Code (IECC) with reference to ASHRAE 90.1-2007 as the statewide minimum standard for commercial buildings, effective July 1, 2012.

Document type: State-specific
Publication Date: June 2013
Page Focus: Adoption

In response to the U.S. Department of Energy's July 19, 2011 notice of determination in the Federal Register regarding the 2009 International Energy Conservation Code (IECC), the State of Nevada certifies that it has reviewed the provisions of Nevada's residential energy codes; conducted a regulation workshop and three regulation hearings to seek public comment as required pursuant to Nevada Revised Statute (NRS); and has adopted the 2009 IECC as the statewide minimum standard, effective July 1, 2012.

Document type: State-specific
Publication Date:
Page Focus: Adoption

Residential energy code application for certification of compliance for new construction, additions or renovations.

Document type: State-specific
Publication Date: July 2013
Page Focus: Adoption

The New Hampshire Office of Energy and Planning hereby certifies that the State of New Hampshire has a residential building energy code that meets the requirements of the 2009 IECC, and a commercial building energy code that meets ASHRAE 90.1-2007.

Document type: State-specific
Publication Date: August 2011
Page Focus: Adoption

In compliance with the Title III of the Energy Conservation and Production Act of 1976, as amended, this document certifies that the state of New Jersey has adopted the 2009 International Energy Conservation Code (IECC) for low-rise residential buildings, along with ASHRAE Standard 90.1-2007 for commercial buildings and all other residential buildings not covered under the 2009 IECC.

Document type: State-specific, Technical Assistance report
Publication Date: January 2003
Page Focus: Adoption

This paper presents an assessment of the energy savings and economic impact for New Mexico to adopt the 2000 International Energy Conservation Code. As of the writing of this report, the state of New Mexico bases its commercial building energy code on the 1986 Model Energy Code, which in turn references ASHRAE Standard 90a-1980 for the commercial building portion of the energy code.

Document type: State-specific
Publication Date: July 2013
Page Focus: Adoption

This letter certifies New Mexico's compliance with the Energy Conservation and Production Act of 1976 (ECPA), as amended . The State of New Mexico has adopted the New Mexico Energy Conservation Code, which references the 2009 version of the International Energy Conservation Code with amendments for residential buildings as well as ASHRAE Standard 90.1-2007 for commercial buildings.

Document type: State-specific, Technical Assistance report
Publication Date: August 2007
Page Focus: Adoption

At the request of the New York State Energy Research and Development Authority and New York State Department of State, the U.S. Department of Energy's Building Energy Codes Program undertook an analysis of the energy savings and cost impacts associated with the proposed adoption of ASHRAE Standard 90.1-2004, and compared it with the requirements based on ASHRAE Standards 90.1-1999 and 90.1-2001.

Document type: State-specific, Technical Assistance report
Publication Date: April 2004
Page Focus: Adoption

The state of New York asked the U.S. Department of Energy to evaluate the cost-effectiveness of the requirement for heat recovery for service water heating that exists in the 2003 International Energy Conservation Code to determine whether this requirement should be adopted into the New York State Energy code.

Document type: State-specific, Technical Assistance report
Publication Date: September 2004
Page Focus: Adoption

The New York State Department of State requested the U.S. Department of Energy (DOE) compare the effects on energy usage as a result of implementation of the 2004 Supplement to the International Energy Conservation Code with the current New York code. The comparison had to determine whether additional costs of compliance with the proposal would be equal to or less than the present value of anticipated energy cost savings over a 10-year period. Under DOE's direction, Pacific Northwest National Laboratory completed the requested assessment of the potential code upgrade.

Document type: State-specific, Technical Assistance report
Publication Date: June 2009
Page Focus: Adoption

The state of New York requested that the U.S. Department of Energy's (DOE's) Building Energy Codes Program (BECP) provide an analysis of the impacts of adoption of ASHRAE Standard 90.1-2007. New York State is unique among states in requiring a ten-year payback for energy code measures. BECP based this analysis on the results of a nationwide, state-by-state code comparison for DOE. This analysis indicates that the adoption of ASHRAE Standard 90.1-2007 is cost-effective under New York’s requirements for all buildings in New York.

Document type: State-specific, Technical Assistance report
Publication Date: June 2004
Page Focus: Adoption

The state of New York asked the U.S. Department of Energy to analyze the potential energy effect and cost-effectiveness of the lighting requirements in the 2003 International Energy Conservation Code as they consider adoption of this energy code. The new provisions of interest in the lighting section of the 2003 IECC include new lighting power densities and requirements for automatic lighting shutoff controls.

Document type: State-specific
Publication Date: July 2013
Page Focus: Adoption

In compliance with Title III of the Energy Conservation and Production Act (ECPA) of 1976, as amended, this is to certify that the State of New York has adopted the 2010 edition of the Energy Conservation Construction Code of New York State (the "2010 ECCCNYS") as New York State's building energy code for residential buildings and non-residential (commercial) buildings.

With regard to residential buildings, the 2010 ECCCNYS is based on, and is equivalent to or more stringent than, the 2009 version of the International Energy Conservation Code.

With regard to commercial buildings, the 2010 ECCCNYS is equivalent to or more stringent than ASHRAE 90.1-2007.

Document type: Code Notes
Publication Date: June 2011
Page Focus: Compliance

The use of header stock over windows and doors in nonbearing walls is typical construction practice throughout the industry. But a single two-inch by four-inch board is allowed to be used as a header in non-load bearing wall systems..

Document type: Reports and Studies
Publication Date: August 2017
Page Focus: Compliance, Residential

A research project in the State of North Carolina identified opportunities to reduce homeowner utility bills in residential single-family new construction by increasing compliance with the state energy code. The study was initiated in January 2015 and continued through September 2015. During this period, research teams visited 249 homes during various stages of construction, resulting in a substantial data set based on observations made directly in the field. Analysis of the data has led to a better understanding of the energy features present in homes, and indicates over $1.5 million in potential annual savings to North Carolina homeowners that could result from increased code compliance.

Document type: State-specific
Publication Date: July 2013
Page Focus: Adoption

In response to the U.S. Department of Energy's July 20, 2011 notice of determination in the Federal Register, North Carolina certifies that it has reviewed and updated the provisions of the 2012 North Carolina Energy Conservation Code governing commercial building energy efficiency to meet or exceed the requirements of ASHRAE Standard 90.1-2007.  An amendment was later adopted that will require compliance with ASHRAE Standard 90.1-2010, effective January 1, 2015.

Document type: State-specific
Publication Date: July 2013
Page Focus: Adoption

In response to the U.S. Department of Energy's July 19, 2011 notice of determination in the Federal Register, North Carolina certifies that it has reviewed and updated the provisions of the 2012 North Carolina Energy Conservation Code governing residential building energy efficiency to meet or exceed the requirements of the 2009 Internation Energy Conservation Code. 

Document type: State-specific, Technical Assistance report
Publication Date: April 2004
Page Focus: Adoption

This report evaluates the potential costs and benefits to North Dakota residents from updating and requiring compliance with ASHRAE Standard 90.1-2001.

Document type: State-specific
Publication Date: July 2013
Page Focus: Adoption

The Board conducted public hearings on November 13, 2009 and January 21, 2011 on proposed updates to the Ohio Building Code including updating the referenced ASHRAE 90.l Standard from the 2004 to the 2007 edition. The Board subsequently adopted these updates effective November 1, 2011 for all new nonresidential construction in Ohio.

The Residential Construction Advisory Committee recommended to the Board that it update the referenced IECC Standard from the 2006 to the 2009 edition, adopt the Ohio Home Builders Association Prescriptive Energy Code Option, and adopt the International Residential Code Chapter 11 requirements with U.S. Department of Energy recommended changes to achieve energy efficiency equivalency to the 2009 IECC as all valid options for energy code compliance in Ohio. The Board accepted the recommendations of the RCAC and conducted a public hearing on these and other updates to the Residential Code of Ohio on April 26, 2012. The Board subsequently adopted...

Document type: State-specific
Publication Date:
Page Focus: Adoption

National codes and standards are incorporated by reference.

Document type: State-specific
Publication Date:
Page Focus: Adoption

This document outlines the organization and division of the Oklahoma Uniform Building Code Commission.

Document type: Code Notes
Publication Date: June 2011
Page Focus: Compliance

The 2009 International Energy Conservation Code, Section 403.2.2, requires that duct systems be pressure tested, or all ducts and air handlers be located in conditioned space. Building cavities used to convey return air located over a crawlspace or next to an unconditioned space would be required to be tested.

Document type: State-specific
Publication Date: December 2008
Page Focus: Adoption

Para-Technical's checklist for the Oregon code adoption process.

Document type: State-specific
Publication Date:
Page Focus: Adoption, Commercial, Residential

The Building Codes Division, part of the Department of Consumer and Business Services, enforces the building code to protect the public and prevent unsafe construction work. Oregon has one statewide building code providing a uniform, consistent and predictable process for Oregon’s construction industry, the public, and state and local government.
Oregon’s building code is applicable in all cities and counties and is enforced locally across the state. The Division provides code enforcement in areas of the state where the local jurisdiction does not.

Document type: State-specific
Publication Date: July 2017
Page Focus: Compliance

In compliance with Title III of the Energy Conservation and Production Act (ECPA) of 1976, as amended, this is to certify that the State of Oregon has adopted the 2014 Oregon Energy Efficiency Specialty Code, which is deemed to be equivalent to energy provisions of ASHRAE Standard 90.1-2013 for commercial buildings.

Document type: State-specific
Publication Date: June 2013
Page Focus: Adoption

In compliance with Title III of the Energy Conservation and Production Act (ECPA) of 1976, as amended, this is to certify that the State of Oregon has adopted the 2010 Oregon Energy Efficiency Specialty Code, which is equivalent to ASHRAE 90.1-2010 for non-residential structures. The State of Oregon has adopted the  2011 Residential Energy Efficiency Specialty Code with energy provisions exceeding those of the 2009 International Energy Conservation Code (IECC) for low-rise residential buildings.

Document type: State-specific
Publication Date: May 2015
Page Focus: Compliance

In compliance with Title III of the Energy Conservation and Production Act (ECPA) of 1976, as amended, this is to certify that the State of Oregon has adopted the 2011 Residential Energy Efficiency Specialty Code with energy provisions that meet or exceed applicable requirements of the 2012 International Energy Conservation Code (IECC) for low-rise residential buildings.

 

 

Publication Date: July 2009
Page Focus: Compliance

The overall objective of the combined studies covered in this report is to provide the Vermont Department of Public Service (DPS) with residential new construction market assessments and baselines to help identify opportunities for increased energy efficiency in Vermont. This report summarizes the combined findings of a phone survey of 296 homeowners, on-site audits conducted at 106 recently constructed homes across Vermont, and in-depth interviews with 25 builders, nine HVAC contractors and ten insulation contractors.

Document type: State-specific, Technical Assistance report
Publication Date: February 2001
Page Focus: Adoption

The Pennsylvania Housing Research Center (PHRC) has created a proposed alternative path for complying with the energy efficiency provisions of the2000 International Energy Conservation Code (IECC) or the 2000 International Residential Code (IRC) for residential buildings. The Pennsylvania Department of Labor and Industry requested that the U.S. Department of Energy (DOE) evaluate the PHRC proposal to determine whether it meets or exceeds the energy efficiency requirements of the IECC. Under DOE's direction, Pacific Northwest National Laboratory reviewed and assessed the PRHC proposal.

Document type: State-specific
Publication Date: September 2009
Page Focus: Adoption

In November 1999, the Pennsylvania Legislature passed ACT 45, known as the Uniform Construction Code, into law mandating a statewide building code across Pennsylvania. Act 45 requires the Pennsylvania Department of Labor and Industry (DLI) to promulgate regulations to implement the requirements of the legislation and, in addition, to consider the development of alternative prescriptive methods for energy conservation that account for the various climatic regions within the Commonwealth. In deriving these energy standards, the DLI was to seek to balance energy savings with initial construction costs.

Document type: Reports and Studies
Publication Date: May 2017
Page Focus: Residential

A research project in the Commonwealth of Pennsylvania identified opportunities to reduce homeowner utility bills in residential single-family new construction by increasing compliance with the state energy code. The study was initiated in October 2014 and continued through July 2015. During this period, research teams visited 171 homes during various stages of construction, resulting in a substantial data set based on observations made directly in the field. Analysis of the data has led to a better understanding of the energy features present in homes, and indicates over $2.7 million in potential annual savings to Pennsylvania homeowners that could result from increased compliance with the 2009 International Energy Conservation Code (and equivalent compliance options). Public and private entities within the state can use this information to justify and catalyze future investments in energy code training and related energy efficiency programs.

Document type: State-specific
Publication Date: July 2013
Page Focus: Adoption

In accordance with the provisions of Section 304(a) of the Energy Conservation and Production Act (ECPA), as amended, this is to certify that the Commonwealth of Pennslyvania has adopted the 2009 International Energy Conservation Code (IECC) and, by reference, ASHRAE 90.1-2007.

Document type: Analysis, Determination
Publication Date: April 2019
Page Focus: Code Development

This report provides preliminary estimates of the incremental costs and savings associated with the residential provisions of the 2018 International Energy Conservation Code (IECC). The analysis is provided to the U.S. Department of Energy (DOE) to help quantify the costs and savings impacts of the latest published edition of the IECC, the 2018 IECC. The resulting information aids in understanding the net costs and economic impacts associated with updated energy codes, which is typically of interest to adopting states and localities.

Document type: Analysis, Determination, Technical Support Document
Publication Date: August 2018
Page Focus: Code Development

The most recent edition, the 2018 IECC, was published in August 2017, triggering the DOE review and determination process. In response, DOE and Pacific Northwest National Laboratory (PNNL) conducted a preliminary analysis to determine energy savings for the 2018 IECC residential provisions relative to the previous edition--the 2015 IECC. This report documents the methodology used to conduct the analysis and summarizes the results and findings.

Document type: Analysis
Publication Date:
Page Focus: Code Development

A quantitative analysis of the estimated differences between ASHRAE Standard 90.1-1989 and ASHRAE Standard 90.1-1999 to inform and support the final determination.

Document type: Reports and Studies, State-specific
Publication Date: November 2013
Page Focus: Adoption

House Bill 202, which was passed during the 2013 Legislative Session, adopted a hybrid version of the 2006, 2009 and 2012 International Energy Conservation Code (IECC) in Utah (“Utah 2012”) for residential buildings and the complete 2012 IECC for commercial buildings. The Utah 2012 and IECC 2012 commercial provisions take effect after the Uniform Building Code Commission certifies in writing to the Utah Legislature that the U.S. Department of Energy (DOE) has adopted a version of REScheck software that can be used to verify compliance with the provisions in H.B. 202.

Document type: Technical Support Document
Publication Date: March 2019
Page Focus: Compliance

This report explains the methodology used to develop version 4.6.5 of the REScheck software in order to support compliance determination for IECC editions 2009, 2012, 2015, and 2018.

Publication Date:
Page Focus:

Step-by-step instructions for using REScheck-Web.

Document type: State-specific
Publication Date: February 2019
Page Focus: Compliance

In early 2017, the Nebraska Energy Office expressed interest in evaluating the construction of new single-family homes in Nebraska using the US Department of Energy's (DOE) low-rise residential evaluation methodology. As part of that methodology, Pacific Northwest National Laboratory (PNNL) was directed by DOE to analyze the data collected in Nebraska. This memorandum provides and discusses the results of PNNL's analysis.

Publication Date:
Page Focus:

Forms available on the Residential Energy Code Field Study page.

Document type: Code Notes
Publication Date: August 2012
Page Focus: Compliance

Over the past several code cycles, mechanical ventilation requirements have been added to ensure adequate outside air is provided for ventilation whenever residences are occupied. These ventilation requirements can be found in the International Residential Code for homes and the International Mechanical Code for dwelling units in multifamily buildings.

Document type: Code Notes
Publication Date: June 2011
Page Focus: Compliance

The 2006 and 2009 International Energy Conservation Code require sizing calculations be performed on every home by referencing International Residential Code Section M1401.3. Section M1401.3 requires heating and cooling systems be sized to the Air Conditioning Contractors of America (ACCA) Manual J - Eighth Addition or other approved heating and cooling load calculations. The ACCA sizing methodology has sufficient built-in safety factors to accommodate most conditioning needs.

Document type: State-specific
Publication Date: July 2013
Page Focus: Adoption

In compliance with Title III of the Energy Conservation and Production Act (ECPA) of 1976, as amended, this is to certify that the State of Rhode Island has adopted the Rhode Island Energy Conservation Code, which references ICC International Energy Conservation Code the 2012 version of the International Energy Conservation Code (IECC) for low-rise residential buildings, as well as ASHRAE Standard 90.1-2010 for nonresidential buildings. The code became effective on July 1, 2013.

Document type: State-specific
Publication Date: July 2013
Page Focus: Adoption

In accordance with the U.S. Department of Energy's determinations on the 2009 IECC and ASHRAE 90.1-2007, the State of South Carolina is submitting its statutorialy required certification that we have reviewed adn adopted both referenced codes.

Document type: Analysis, Reports and Studies
Publication Date: April 2012
Page Focus: Code Development

Pacific Northwest National Laboratory (PNNL) conducted a series of cost effectiveness analyses for the U.S. Department of Energy (DOE), covering the 2009 and 2012 editions of the International Energy Conservation Code (IECC) for new single and multifamily homes. The evaluations were performed against a 2006 IECC baseline, taking state-specific code amendments into consideration. These reports outline the results of these analyses, including a National Cost Analysis and Cost Analyses for selected states.

Document type: Analysis
Publication Date: February 2015
Page Focus: Code Development

These analyses evaluate the cost-effectiveness of the prescriptive path of the 2015 edition of the International Energy Conservation Code (IECC), relative to the 2006 IECC for all 50 states and the District of Columbia. The analysis covers one- and two-family dwelling units, town-homes, and low-rise multifamily residential buildings covered by the residential provisions of the 2015 IECC. These reports were originally published in October 2015, and updated in February 2016 to update numbers reported in certain results tables.

Document type: Reports and Studies
Publication Date: January 2015
Page Focus: Adoption

The purpose of this analysis is to examine the cost-effectiveness of the 2013 edition of ANSI/ASHRAE/IES1 Standard 90.1 (ANSI/ASHRAE/IES 2013). PNNL analyzed the cost-effectiveness of changes in Standard 90.1 from 90.1-2010 to 90.1-2013, as applied in commercial buildings across the United States. During the development of new editions of Standard 90.1, the cost-effectiveness of individual changes (addenda) is often calculated to support the deliberations of ASHRAE Standard Standing Project Committee (SSPC) 90.1. The ASHRAE process, however, does not include analysis of the cost-effectiveness of the entire package of addenda from one edition of the standard to the next, which is of particular interest to adopting State and local governments. Providing States with an analysis of cost-effectiveness may encourage more rapid adoption of newer editions of energy codes based on Standard 90.1. This information may also inform the development of future editions of Standard 90.1.

Document type: Technical Support Document
Publication Date: September 2012
Page Focus: Compliance

This technical support document (TSD) is designed to explain the technical basis for the COMcheck software as originally developed based on the ANSI/ASHRAE/IES Standard 90.1-1989 (Standard 90.1-1989). Documentation for other national model codes and standards and specific state energy codes supported in COMcheck has been added to this report as appendices. These appendices are intended to provide technical documentation for features specific to the supported codes and for any changes made for state-specific codes that differ from the standard features that support compliance with the national model codes and standards. Beginning with COMcheck version 3.8.0, support for 90.1-1989, 90.1-1999, and the 1998 IECC and version 3.9.0 support for 2000 and 2001 IECC are no longer included, but those sections remain in this document for reference purposes.

Document type: State-specific
Publication Date:
Page Focus: Adoption

The Tennessee State Fire Marshal’s Office will implement enforcement of adopted energy codes for new building project submissions as of Friday, July 1, 2011. The energy codes adopted are:

  • All buildings other than state buildings: The 2006 International Energy Conservation Code
  • State buildings: ASHRAE Standard 90.1-2007.
Document type: State-specific
Publication Date: July 2013
Page Focus: Adoption

The State of Tennessee, Department of Commerce and Insurance, Division of Fire Prevention certifies that it has adopted the 2006 International Energy Conservation Code (IECC) for one and two family dwellings and townhouses and non-State owned commercial buildings, and ASHRAE 90.1-2007 for State Buildings.

Document type: State-specific, Technical Assistance report
Publication Date: September 2005
Page Focus: Adoption

In 2001, the State of Texas adopted the 2001 International Energy Conservation Codes as its statewide commercial building energy code standard. this report examines the potential impacts of updating lighting requirements in Texas the 2003 IECC.

Document type: Reports and Studies
Publication Date: April 2017
Page Focus: Residential

A research project in the state of Texas identified opportunities to reduce homeowner utility bills in residential single-family new construction by increasing compliance with the state energy code. The study was initiated in October 2014; data collection began in March 2015, and continued through October 2015. During this period, research teams visited 133 homes in 30 counties in and around Houston during various stages of construction, resulting in a substantial data set based on observations made directly in the field. Stakeholders in the state agreed that these 30 counties represented the levels of energy codes and enforcement seen across the state. Analysis of the data has led to a better understanding of the energy features present in homes, and, when extrapolated across the entire state, indicates over $16 million in potential annual savings to Texas homeowners that could result from increased code compliance. Public and private entities within the state can use this...

Document type: State-specific
Publication Date: September 2016
Page Focus: Adoption

The Texas State Energy Conservation Office (SECO)adopted the 2015 IECC effective Nov. I, 2016, for all commercial and residential buildings greater than three stories above grade and for state-funded buildings SECO adopted the ASHRAE Standard 90.1-2013, with an effective date of June I, 2016.

For residential buildings, Texas Governor Greg Abbott signed HB 1736 on June 16, 2014 moving the state's single-family residential energy code from the 2009 code to the 2015 International Residential Code (IRC), Chapter 11, effective September I, 2016. The Texas state legislature modified the 2015 IRC Energy Rating Index scores to a set of scaled scores that increases in stringency over time.

Publication Date: June 2013
Page Focus: Adoption

The State of Texas, in compliance with the Energy Conservation and Production Act (ECPA) of 1976, as amended, has reviewed the provisions of ASHRAE 90.1-2007 for energy efficiency in commercial buildings.  The Texas State Energy Conservation Office adopted teh 2009 IECC effective April 1, 2011 for all commercial and residential buildings greater than three stories above grade.  A study done by the Energy System's Laboratory of Texas A&M University deomstrates that the 2009 IECC code results in equivalent overall energy savings performance when compared to ASHRAE Standard 90.1-2007 for large office buildings in Texas.

Document type: State-specific
Publication Date: June 2013
Page Focus: Adoption

The Texas State Energy Conservation Office, which has the statutory authority to adopt the latest energy codes in Texas, asdopted the 2009 IECC effective April 1, 2011 for all commercial and residential buildings greater than three stories.

Document type: State-specific
Publication Date:
Page Focus: Adoption

 The Oklahoma Uniform Building Code Commission (the "OUBCC") hereby adopts the International Residential Code®, 2015 Edition (IRC 2015), as amended and modified in this subchapter to be the statewide minimum code for residential construction within the State of Oklahoma for one- and two-family dwellings and townhouses pursuant to 59 O.S. § 1000.23.

Document type: State-specific
Publication Date: April 2015
Page Focus: Compliance

The State of Tennessee, Department of Commerce and Insurance, Division of Fire Prevention, previously sent a letter, dated July 18, 2013, to the U.S., Department of Energy certifying that it had adopted the 2006 International Energy Conservation Code (IECC) for one and two family dwellings and townhouses and non-State owned commercial buildings, and the American Society of Heating Refrigerating and Air-Conditioning Engineers (ASHRAE) Standard 90.1-2007 for State buildings.

In that letter, the State of Tennessee sought an extension until March 31, 2015, to review and consider adoption of updated editions of the IECC and ASHRAE standards to comply with the certification requirements of Section 304(C) of the Energy Policy and Conservation Act (EPCA).  However, due to the current political environment and coinciding circumstances, the State of Tennessee requests additional time, specifically December 1, 2015, in which to adopt the 2009 IECC and ASHRAE 90.1-2010.

...
Document type: Code Notes
Publication Date: October 2011
Page Focus: Compliance

Adequate attic ventilation is a long-standing requirement in building codes for moisture control. However, unvented attics can reduce residential energy needs, and are allowed by the code under certain conditions.

Section R806.4 of the 2009 International Residential Code® (IRC), and Section R806.5 of the 2012 IRC have requirements for unvented (conditioned) attic assemblies.

Document type: State-specific, Technical Assistance report
Publication Date: May 2009
Page Focus: Adoption

An analysis by Pacific Northwest National Laboratory show that the 2009 International Energy Conservation Code (IECC) contains several major improvements in energy efficiency over the current Utah code, the 2006 IECC. The most notable changes are improved duct sealing and efficient lighting requirements. A limited analysis of these changes resulted in estimated savings of $168 to $188 for an average new house in Utah at recent fuel prices.

Document type: State-specific
Publication Date: July 2013
Page Focus: Adoption

2012 IECC Chapter 4, annotated with Utah's amendments.

Document type: State-specific
Publication Date: September 2012
Page Focus: Compliance, Enforcement

This Guide is designed to assist state and local code jurisdictions in achieving statewide compliance with the 2006 International Energy Conservation Code (IECC) for residential buildings and ASHRAE Standard 90.1-2007 for commercial buildings.

Document type: Code Notes
Publication Date: May 2009
Page Focus: Compliance

Condensing dryers can be useful in situations where the laundry room is located a significant distance from an exterior wall to which it can vent. By eliminating long dryer vent runs, they eliminate possible moisture condensation problems in that run.

Document type: Code Notes
Publication Date: June 2018
Page Focus: Compliance

The intent of the vestibule requirement is to reduce infiltration of air into a space, thereby addressing energy conservation and comfort issues for occupants located near primary entrance doors. The majority of infiltration comes through primary entrance doors that are typically used to access public areas, and have higher usage rates than doors classified for personnel use. Vestibules can reduce the infiltration losses (or gains) from wind and stack effects by creating an air lock entry.

Document type: State-specific
Publication Date: October 2019
Page Focus: Compliance

A research project in the Commonwealth of Virginia identified opportunities to reduce homeowner utility bills in residential single-family new construction by increasing compliance with the state energy code. The study was initiated in August 2017 and continued through May 2018. Analysis of the data has led to a better understanding of the energy features present in homes and indicates over $2.9 million in potential annual savings to Virginia homeowners that could result from increased code compliance.

Document type: State-specific
Publication Date: July 2013
Page Focus: Adoption

In compliance with Title III of the Energy Conservation and Production Act (ECPA) of 1976, as amended, this is to certify that the State of Washington has adopted the 2012 Edition, Washington State Energy Code, which meets or exceeds the 2012 version of the International Energy Conservation Code (IECC) for low-rise residential buildings, as well as ASHRAE 90.1-2010 for nonresidential buildings.

Document type: State-specific
Publication Date: July 2013
Page Focus: Adoption

In compliance with Title III of the Energy Conservation adn Production Act of 1976, as amended, this is to certify that the District of Columbia has taken the appropriate actions as listed to meet the statutory requirements related to the Department of Energy (DOE) determinations for the 2009 International Energy Conservation Code (IECC) and ASHRAE 90.1-2007/

Document type: State-specific, Technical Assistance report
Publication Date: December 2006
Page Focus: Adoption

The U.S. Department of Energy has requested Pacific Northwest National Laboratory to estimate the energy savings, economic impacts, and pollution reduction from adopting the 2003 International Energy Conservation Code (IECC) as the mandatory residential energy efficiency code in the state of West Virginia. The state currently allows a less energy efficient replacement option. This report addresses the impacts for low-rise residential buildings only.

Document type: State-specific
Publication Date:
Page Focus: Adoption

This rule establishes the standards considered necessary by the State Fire Commission for the safeguarding of life and property and to ensure compliance with the minimum standards of safe construction of all structures erected or renovated throughout West Virginia.

Document type: State-specific
Publication Date: June 2013
Page Focus: Adoption

West Virginia has adopted the 2009 International Energy Conservation Code for residential construction and the ASHRAE 90.1-2007 standard for commercial building construction.

Document type: State-specific
Publication Date:
Page Focus: Adoption

Under the statute sections listed in this document, the Department of Commerce has the responsibility to adopt rules that establish uniform, statewide standards for the construction of 1- and 2-family dwellings. This code, in its entirety, first went into effect in 1980. Sections 101.63 (5) and 101.73 (8), Stats., require the department to review these rules on a biennial basis.

Document type: State-specific
Publication Date: July 2013
Page Focus: Adoption

This letter will serve as certification that the 2009 IECC code with Wisconsin amendements as contained in SPS chapters 360-366 were implemented on Sept. 1, 2011. Attached to this letter is an analysis of current Wisconsin UDC versus the 2012 IECC (prepared by the Midwest Energy Efficiency Alliance), which Wisconsin is in the process of evaluating (as of the date of this letter).  Changes to the Wisconsin Commercial Building Code were also implemented on Septemeber 1, 2011. This letter certifies that Wisconsin  Commercial Building Code adopted the 2009 editions of the International Building Code and the International Energy Conservation Code, with amendments as addressed in SPS Chapters 360-366.

Document type: State-specific, Technical Assistance report
Publication Date: October 2007
Page Focus: Adoption

As of the writing of this report, the state of Wyoming currently does not have a statewide building energy efficiency code for residential buildings, although Laramie adopted the 2003 International Energy Conservation Code. The U.S. Department of Energy has requested Pacific Northwest National Laboratory to estimate the energy savings and economic impacts from adopting the 2006 IECC. This report addresses the impacts for residential buildings only.

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