Publications

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Document type: Comparison, State-specific, Technical Assistance report
Publication Date: August 2005
Focus: Adoption

This study was undertaken for the Arizona Department of Commerce, who requested the U.S. Department of Energy (DOE) provide technical assistance with regard to identifying the major differences in the model energy codes as they might be applied to various locations in Arizona. This study focuses upon the requirements for commercial (non-residential) buildings in these codes. In both codes, “commercial” buildings include high-rise multi-family buildings as well as traditional “commercial” occupancies such as offices, retail buildings, and assembly buildings.

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

As of the writing of this report, the state of Illinois does not have a statewide building energy efficiency code for residential buildings, although a number of jurisdictions in Illinois have adopted the 2000 International Energy Conservation Code (IECC) or the 2003 IECC.


The U.S. Department of Energy requested Pacific Northwest National Laboratory estimate the energy savings, economic impacts, and pollution reduction from adopting the 2006 IECC. This report addresses the impacts for low-rise residential buildings only.

Document type: State-specific, Technical Assistance report
Publication Date: September 2002
Focus: Adoption

This study includes the impacts of adopting only the building envelope and lighting requirements of ASHRAE Standard 90.1-1999 and applying it only to new commercial construction. This report builds on a previous study that uses prototypical office, retail, and education buildings to estimate life-cycle cost savings estimates per square foot. Office, retail, and education buildings made up over 60% of the total value of new commercial construction in Illinois in 1997.

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

This report is an update of a previous report, Statewide Savings Projections from the Adoption of a Commercial Building Energy Code in Illinois, completed in September 2002. This updated version incorporates the most recent—as of the writing of this report—gas and electric rates into the analysis.


The results of this analysis suggest that adopting and enforcing a commercial building energy code throughout the state of Illinois could produce substantial energy and cost savings, while reducing emissions of greenhouse gases.

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

This nationwide analysis of commercial energy code compares ASHRAE Standard 90.1-2007 with the commercial code in each state as of June 2009. The results are provided in chapters specific to each state.

States with unique energy codes were not included in the analysis because the codes in these states would be difficult to appropriately compare to ASHRAE Standard 90.1 and most of these states have energy offices that routinely assess their codes against the model codes. In states with codes prior to and including the 2000 IECC or Standard 90.1-1999, those states with no statewide energy code, and home rule states which did not specifically request that another code be used, Standard 90.1-1999 was used as the baseline for comparison.

Three DOE Benchmark buildings were used for the simulation used in this analysis: a medium office building (53,600 ft2), a mid-rise apartment building (33,700 ft2), and a non-refrigerated warehouse (49,500 ft2...

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

This analysis of residential energy code 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 chapters specific to each state.

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 because 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.

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

Iowa’s Department of Natural Resources requested that the U.S. Department of Energy (DOE) compare the 1992 Model Energy Code with the 2003 International Energy Code to estimate impacts from updating Iowa's residential energy code to comply with the new code. Under DOE's direction, Pacific Northwest National Laboratory (PNNL) completed an assessment of the impacts from this potential code upgrade, including impacts on construction and energy consumption costs. This report is an update to a similar report completed by PNNL in 2002 that compared the 1992 MEC to the 2000 IECC.

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

At the request of the Government Accountability Office, The U.S. Department of Energy's Building Energy Codes Program (BECP) undertook an analysis of the energy savings and cost impacts associated with the use of newer and more efficient commercial building energy codes in the states of Louisiana and Mississippi. BECP looked at three levels of energy standards – ASHRAE Standard 90-75, ASHRAE 90.1-2001, and ASHRAE Standard 90.1-2004 – that cover both the full range of standards currently on the books in Louisiana and Mississippi and the logical next standards for these states.

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

At the request of the Government Accountability Office, the U.S. Department of Energy's Building Energy Codes Program undertook an analysis of the energy savings and cost impacts associated with the use of newer and more efficient residential building energy codes in the states of Louisiana and Mississippi.


The intent of this analysis is to determine the potential energy and economic impacts from improved energy efficiency alternatives available for residential buildings during the reconstruction process after Hurricane Katrina.

Document type: Technical Assistance report
Publication Date: September 2006
Focus: Adoption

The state of Michigan asked the U.S. Department of Energy to analyze the potential energy effect and cost-effectiveness of the lighting requirements in ASHRAE Standard 90.1-2004 as they consider adoption of this energy code in place of ASHRAE Standard 90.1-1999. The primary change of interest in the lighting section of the 90.1-2004 Standard is the set of revised interior lighting power densities that provide for stricter lighting compliance levels.

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

At the request of the Montana Energy Office, the U.S. Department of Energy’s Building Energy Codes Program undertook an analysis of the energy savings associated with slab insulation in small commercial buildings.

Document type: State-specific, Technical Assistance report
Publication Date: January 2003
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, Technical Assistance report
Publication Date: August 2007
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
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
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
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
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, Technical Assistance report
Publication Date: April 2004
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, Technical Assistance report
Publication Date: February 2001
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, Technical Assistance report
Publication Date: September 2005
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: State-specific, Technical Assistance report
Publication Date: May 2009
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, Technical Assistance report
Publication Date: December 2006
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, Technical Assistance report
Publication Date: October 2007
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.