Publications

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

The Energy Conservation and Production Act provides that whenever the ASHRAE Standard 90.1-1989, or any successor to that code is revised, the Secretary of Energy must determine whether the revised code would improve energy efficiency in commercial buildings

The U.S. Department of Energy has performed both a quantitative analysis of the likely impacts of the revised code on the energy efficiency of seven categories of new commercial buildings, compared to the 1989 edition, and a non-quantitative assessment of the comparative stringency of those elements of the revised code that could not be analyzed quantitatively.

The quantitative analysis concluded that the1999 revision of the code would likely reduce the source energy consumption of new commercial buildings by approximately 5.9 percent. Site energy savings were estimated to be approximately 3.9 percent. The comparative assessment of those elements of the 1989 and 1999 revised codes that could not be...

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

Codes allow crawlspaces with mechanical ventilation instead of crawlspaces with passive vents to the outdoors. However, code officials and builders are often uncertain about the design details.

Document type: Determination, Technical Support Document
Publication Date: September 2009
Page Focus:

The Energy Conservation and Production Act of 1976, as amended, requires the U.S. Department of Energy (DOE) to determine whether revisions to the 2006 International Energy Conservation Code (IECC) would improve energy efficiency in residential buildings. An “affirmative determination” for any IECC revision triggers a requirement that each state certify to DOE, within 2 years of the publication of the determination, that it has reviewed the provisions of the new code and made a determination whether it is appropriate to update its building code(s) to meet or exceed the revised IECC.

Document type: Determination
Publication Date: July 2005
Page Focus: Code Development

The U.S. Department of Energy (DOE) determined that ASHRAE Standard 90.1-1999, would achieve greater energy efficiency in buildings, except low-rise residential buildings, than ASHRAE Standard 90.1-1989. As a result of this positive determination regarding ASHRAE Standard 90.1-1999, each state is required to certify that it has reviewed and updated the provisions of its commercial building code regarding energy efficiency to meet or exceed ASHRAE Standard 90.1-1999 for any “building” within the meaning of Section 303(2) of the Energy Conservation and Production Act of 1976, as amended. This Notice provides guidance to states on certifications, and requests for extensions of deadlines for certification statements.

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

Duct insulation and sealing, especially insulated supply ducts delivering conditioned air within a building, save energy. The intent of energy efficiency codes, as related to duct insulation and sealing, is to keep mechanically warmed or cooled air as close to a constant, desired temperature as possible and prevent the conditioned air from escaping the duct system while it is being moved to spaces where it is needed. If reduced heat transfer through insulated ducts is accounted for in the heating, ventilating, and air conditioning (HVAC) load calculations, it may even be possible to reduce the size of HVAC equipment.

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

Many studies have shown that visual inspection of duct seals in residences is not enough. Code now requires a pressure test. Pressure testing ducts as required by the 2009 International Energy Conservation Code is far superior to visual inspection and will definitively confirm that duct leakage is kept to a low level.

Document type: Reports and Studies
Publication Date: December 2014
Page Focus: Adoption

This report and an accompanying spreadsheet compile the end use building simulation results for prototype buildings throughout the United States. The results represent the energy use of each edition of ANSI/ASHRAE/IES Standard 90.1, Energy Standard for Buildings Except Low-Rise Residential Buildings.

Document type: Analysis
Publication Date: August 2015
Page Focus: Commercial

This report provides an assessment as to whether new buildings constructed to the commercial energy
efficiency provisions of the 2015 IECC would save energy and energy costs as compared to the 2012
IECC. PNNL also compared the energy performance of the 2015 IECC with the corresponding Standard
90.1-2013. The purpose of this analysis is to help states and local jurisdictions make informed decisions
regarding model code adoption.

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

The purpose of this analysis is to assess the relative energy and energy cost performance of commercial buildings designed to meet the requirements found in the commercial energy efficiency provisions of the International Energy Conservation Code (IECC). Section 304(b) of the Energy Conservation and Production Act (ECPA), as amended, requires the Secretary of Energy to make a determination each time a revised version of ASHRAE Standard 90.1 is published with respect to whether the revised standard would improve energy efficiency in commercial buildings. As many states have historically adopted the IECC for both residential and commercial buildings, PNNL has evaluated the impacts of the commercial provisions of the 2006, 2009, and 2012 editions of the IECC. PNNL also compared energy performance with corresponding editions of ANSI/ASHRAE/IES Standard 90.1 to help states and local jurisdictions make informed decisions regarding model code adoption.

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

DOE and Pacific Northwest National Laboratory (PNNL) conducted a technical 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, Determination
Publication Date: October 2017
Page Focus: Code Development

To meet statutory requirements, DOE conducted an analysis to quantify the expected energy savings associated with Standard 90.1-2016. This report documents the methodology used to conduct the analysis. Based on the analysis, DOE has determined that the 2016 edition of the ANSI/ASHRAE/IES Standard 90.1 would improve overall energy efficiency in buildings subject to the code compared to the 2013 edition of Standard 90.1.

Document type: Analysis
Publication Date: April 2013
Page Focus: Code Development

The 2009 and 2012 International Energy Conservation Codes (IECC) require a substantial improvement in energy efficiency compared to the 2006 IECC. This report averages the energy use savings for a typical new residential dwelling unit based on the 2009 and 2012 IECC compared to the 2006 IECC. Results are reported by the eight climate zones in the IECC and for the national average.

Document type: Model Data
Publication Date: April 2014
Page Focus: Code Development

EnergyPlus TMY3 weather files for 17 climate locations associated with the ASHRAE Standard 90.1 Prototype Building Models. See the Commercial Prototype Building Models page for the individual weather data files listed by Climate Zone. Updated file posted 10/22/18.

Document type: Model Data
Publication Date: April 2014
Page Focus: Code Development

Since the last publication of the commercial prototype building models, PNNL has made numerous enhancements to the original prototype models compliant with the 2004, 2007, and 2010 editions of Standard 90.1. Those enhancements are described here and were made for several reasons: (1) to change or improve prototype design assumptions; (2) to improve simulation accuracy; (3) to improve simulation infrastructure; and (4) to add additional detail to the models needed to capture certain energy impacts from Standard 90.1 improvements.

Document type: State-specific
Publication Date: August 2012
Page Focus: Adoption

In compliance with Title III of the Energy Conservation and Production Act of 1976, as amended, the Florida Building Commission, which has statutory authority to administer the Florida Building Code (s. 553.72(3), Florida Statutes), hereby certifies that Chapter 5 of the 2010 Florida Building Code, Energy Conservation, meets or exceeds ASHRAE Standard 90.1-2007, Energy Standard for Buildings, Except Low-Rise Residential Buildings for buildings other than low-rise residential.

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

The Florida Building Commission, which has statutory authority to administer the Florida Building Code (s. 553.72(3), Florida Statutes), hereby certifies that Chapter 4 of the 2010 Florida Building Code, Energy Conservation meets or exceeds the 2009 edition of the International Energy Conservation Code for low-rise residential buildings. 

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

A research project in the State of Georgia 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 April 2015 and continued through November 2015. During this period, research teams visited 216 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 $3 million in potential annual savings to Georgia homeowners that could result from increased code compliance.

Document type: Resource Guide
Publication Date: September 2011
Page Focus: Adoption, Code Development, Green and Advanced Codes

The Going Beyond Code Guide is designed to help state and local governments design and implement successful "beyond code" programs for new commercial and residential buildings. The goal is to help states and localities establish voluntary or mandatory programs that go well beyond traditional minimum code requirements for new buildings.

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

In accordance with the provisions of Section 304 of the Energy Conservation and Production Act (ECPA), as amended under 42 U.S.C 6833(b)(2)(B)(i) and 42 U.S.C 6833 (a)(l), each state must file certification statements to the U.S. Department of Energy (DOE) that it has reviewed the provisions of its building codes regarding energy efficiency and make a determination as to whether to update its code to meet or exceed the 2015 IECC, as well as ASHRAE 90.1-2013.

In 2010, the State of Hawaii adopted the 2006 IECC with amendments as the State Energy Conservation Code, referenced herein as the Hawaii Energy Code (HEC). The Hawaii State Energy Office has contracted with the Britt/Makela Group (BMG) team to provide analyses of proposed amendments to residential and commercial provisions of the 2015 IECC. The outcome of this analysis will be to facilitate adoption at the state and county level. In addition, the analysis provides a basis for the Hawaii State Energy Office to...

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

Headers for windows and doors are typically supported by cripples or jack studs. These studs can be eliminated using header hangers, as allowed under the International Residential Code.

Document type: Reports and Studies
Publication Date: May 2014
Page Focus: Adoption, Code Development, Compliance, Residential

Pacific Northwest National Laboratory analyzed the relationship between the Residential Energy Services Network (RESNET) Home Energy Rating System (HERS) Index and the traditional simulation-based Performance Path used in the International Energy Conservation Code (IECC). The analysis evaluates, for a single-family residence with various characteristics, the ranges of HERS Index values that would imply compliance with the 2012 IECC Performance Path. Several building characteristics considered likely to result in quantifiable differences in the outcomes of the two approaches, or otherwise believed to be of interest to code developers and policy makers, are considered in the analysis.

Document type: Resource Guide
Publication Date: September 2011
Page Focus: Compliance

Ensuring compliance with HVAC control requirements is difficult, as controls can be difficult to identify on plans or in the building, yet it is a crucial task. HVAC controls are a key driver of building performance and without compliance and enforcement activities, the code requirements may be ignored, overlooked, or misunderstood.

This guide provides an aid that will make it easier to apply the heating, ventilation, and air conditioning (HVAC) control requirements found in building energy codes and addresses requirements defined by 2009 and 2012 editions of the International Energy Conservation Code (IECC) and ASHRAE Standard 90.1-2007 and ASHRAE Standard 90.1-2010.

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

Title 39, Chapter 41, "Idaho Building Code Act" (§ 39-4101) of the Idaho Statutes and Administrative Rules authorizes the state division of building safety and local governments to adopt and enforce building codes pursuant to the provisions of this chapter.

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

A research project in the state of Idaho identified opportunities to reduce homeowner energy costs in residential single-family new construction by increasing compliance with the current state energy code. The study was initiated in January 2018; data collection began in March 2018 and continued through June 2018. During this period, research teams visited 127 homes during various stages of construction, resulting in a collection of data 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 nearly $500,000 in potential annual savings to Idaho homeowners that could result from increased compliance with the Idaho Energy Conservation Code.

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Alabama, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Alaska, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Arizona, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Arkansas, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of California, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Colorado, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: April 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

Complete IECC Prototype Building Model packages include files for every state by IECC version.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Note: each of these files are over 100 MB in size; download times may vary.

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Connecticut, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Delaware, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the District of Columbia, using a customized version of the 2009 IECC as the baseline code with improved wall and ceiling insulation levels.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Florida, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Georgia, using a customized version of the 2009 IECC as the baseline code with better windows.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Hawaii, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Idaho, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Illinois, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Indiana, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Iowa, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

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

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Kansas, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Kentucky, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Louisiana, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Maine, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Maryland, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Massachusetts, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Michigan, using a customized version of the 2009 IECC as the baseline code without duct testing requirements.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Minnesota, using a customozed version of the 2006 IECC as the baseline code with lower wall and ceiling insulation levels.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Mississippi, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Missouri, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Montana, using a customized version of the 2009 IECC as the baseline code with R-21 walls and U-0.33 windows.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Nebraska, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Nevada, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of New Hampshire, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of New Jersey, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of New Mexico, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of New York, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of North Carolina, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of North Dakota, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Ohio, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

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

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Oklahoma, using a customized version of the 2009 IECC as the baseline code with improved windows in climate zone 3.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Oregon, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Pennsylvania, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Rhode Island, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of South Carolina, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of South Dakota, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Tennessee, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

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

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Texas, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Utah, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Vermont, using a customized version of the 2009 IECC as the baseline code with better slab insulation and windows and tighter duct sealing.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Virginia, using a customized version of the 2009 IECC as the baseline code without duct testing requirements.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Washington, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of West Virginia, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Wisconsin, using a customized version of the 2006 IECC as the baseline code with improved wall insulation and windows.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Page Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Wyoming, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

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

With respect to the State facilities covered by  71 Ill. Adm. Code 600.Subpart B:

This Part, all additional requirements incorporated within Subpart B (including ASHRAE 90.1 Standards, including all published errata but excluding published supplements that encompass ASHRAE
90.1-2013), and any statutorily authorized adaptations to the incorporated standards adopted by CDB are effective January 1, 2016.

With respect to the privately funded commercial facilities covered by 71 Ill. Adm. Code 600.Subpart C:

This Part, all additional requirements incorporated within Subpart C (including the 2015 International Energy Conservation Code, including all published errata and excluding published supplements that encompass ASHRAE 90.1-2013), and any statutorily authorized adaptations to the incorporated standards adopted by CDB, are effective January 1, 2016.

Document type: State-specific
Publication Date: September 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 Illinois has adopted the Illinois Energy Conservation Code, which consists of the 2012 version of the International Energy Conservation Code (IECC) for low-rise residential buildings (with Illinois specific amendments), as well as ASHRAE Standard 90.1-2010 for nonresidential buildings.

Document type: Analysis
Publication Date: October 2016
Page Focus: Adoption, Compliance, Enforcement

Pacific Northwest National Laboratory (PNNL), funded by DOE, conducted an assessment of the prospective impacts of national model building energy codes from 2010 through 2040. A previous PNNL study evaluated the impact of the Building Energy Codes Program1; this study looked more broadly at overall code impacts. This report describes the methodology used for the assessment and presents the impacts in terms of energy savings, consumer cost savings, and reduced CO2 emissions at the state level and at aggregated levels.

Document type: State-specific, Technical Assistance report
Publication Date: September 2009
Page 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
Page 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: Analysis, Reports and Studies
Publication Date: March 2017
Page Focus: Adoption, Compliance

This study used a three-step process to evaluate the degree to which high-impact controls requirements included in commercial energy codes are realizing their savings potential. The three-step process included: (1) interviews of commissioning agents; (2) field audits of a sample of commercial buildings to determine how well control measures are being designed, commissioned and correctly implemented; and (3) analysis of the information gathered.

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

The intent of the pipe insulation requirements is to reduce temperature changes while fluids are being transported through piping associated with heating, cooling or service hot water (SHW) systems, thereby saving energy and reducing operating costs.

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

The intent of the pipe insulation requirements is to reduce temperature changes while fluids are being transported through piping associated with heating, cooling or service hot water (SHW) systems, thereby saving energy and reducing operating costs.

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

The 2009 International Energy Conservation Code, was adopted by reference as the residential energy code of the state of Iowa building code, applicable to residential construction limited to three or fewer stories throughout the state of Iowa, with the amendments outlined in this document.

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

This form is to be used by Iowa registered architects and licensed professional engineers to show compliance with Iowa Code 103A.19 and Administrative Rule 661-303.1(3), in the design of buildings which are subject to this law.

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

The Iowa state building code commissioner, with the approval of the advisory council, formulates, adopts, amends and/or revises and promulgates reasonable rules designed to establish minimum safeguards in building construction, and establishes regulations to protect the health, safety, and welfare of the public.

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

The State of Iowa has adopted the residential energy code requirements of the 2009 International Energy Conservation Code (IECC), effective as of 01/01/10 (Iowa Administrative Code 661 - Chaper 303.2 with reference to Iowa Code section 103A). Iowa has adopted the commercial energy code requrements of the 2009 IECC, effective as of 01/01/10 (Iowa Administrative Code 661 - Chaper 303.3 with reference to Iowa Code section 103A).  ASHRAE Standard 90.1 is adopted by reference for the commercial part of the code in Section 501.2 of the 2009 IECC.

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

A research project in the Commonwealth of Kentucky 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 April 2015 and continued through August 2015. During this period, research teams visited 140 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 $1,200,000 in potential annual savings to Kentucky 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 adn Production Act (ECPA) of 1976, as amended, this is to certify that the Commonwealth of Kentuchy has adopted by reference the 2009 version of the International Energy Conservation Code (IECC) afor low-rise residential builidings, as well as ASHRAE Standard 90.1-2007 for non-residential buildings (by virtue of its reference within the 2009 IECC).

Document type: State-specific
Publication Date: May 2014
Page Focus: Adoption

In compliance with Title III of the Energy Conservation adn Production Act (ECPA) of 1976, as amended, this is to certify that the Commonwealth of Kentuchy is now in the process of amending the 2013 Kentucky Building Code to adopt by reference the 2012 version of the International Energy Conservation Code (IECC), as well as ASHRAE Standard 90.1-2010 for non-residential buildings (by virtue of its reference within the 2012 IECC).  

In addition, the Board of Housing, Buildings and Construction voted not to adopt the 2012 IECC with respect to Kentucky's residential code.

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

Letter from the Kentucky Department of Housing, Buildings and Construction requesting a deadline to file Kentucky's certification statement with respect to ASHRAE Standard 90.1-2010.

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

Kitchen and dining facilities use a large amount of energy per floor area. Kitchen exhaust hoods contribute greatly to that energy use. Energy is used both to operate fans and to heat and cool makeup air that is then exhausted.

Document type: Resource Guide
Publication Date: September 2012
Page Focus: Adoption, Code Development, Compliance

This guide provides information for anyone dealing with a lighting energy code or standard. It provides background and development information to help readers understand the basis for requirements and their intent. The guide also provides detailed explanations of the major types of requirements such that users can more effectively design to meet compliance while applying the most flexibility possible.

Publication Date: July 2013
Page Focus: Adoption

The energycode for one- and two-family residential structures in Louisiana is Part IV: Energy Conservation of the 2006 IRC. 2009 IECC is currently being enforced in low-rise, multifamily residential structures. ASHRAE 90.1-2007 is currently enforced for commercial construction.

This letter certifies that ACT 390 of 2013 has been signed by the Governor, and it will update Part IV: Energy Conservation of the 2009 IRC effective January 1, 2014, and that ASHRAE Standard 90.1-2007 is the code  currently enforced by the Louisiana Office of the State Fire Marshal for commercial construction.

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

The Maine Legislature enacted the Uniform Building and Energy Code (PL 2007, Chapter 699 and amendments PL 2009, Chapter 261). This document provides some answers to frequently-asked questions about the code.

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

The State of Maine has adopted building codes for energy efficiency; they are included in the Maine Uniform Building and Energy Code (MUBEC). The State of Maine has adopted the 2009 International Energy Conservation Code, as well as ASHRAE Standard 90.1-2007.  The 2009 IECC is required; ASHRAE Standard 90.1-2007 is included as part of MUBEC, but compliance is not mandatory.

Document type: Reports and Studies
Publication Date: September 2016
Page Focus: Residential

A research project in the state of Maryland investigated energy code-related aspects of residential single-family new construction. The study was initiated in January 2015 and continued through July 2015. During this period, research teams visited 207 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 savings to Maryland homeowners that could result from increased code compliance. 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

By legislation, the Maryland Building Performance Standards (MPBS) which was adopted in 1994 is updated every three years to coincide with the International Code Council (ICC) change cycle, as the ICC updates their I-codes. The MBPS adopted the 2012 International Energy Conservation Code and ASHRAE 90.1-2010 on January 1, 2012. Maryland legislation requires the State of Maryland to adopt the first printing of the latest International Building Code, International Residential Code and the International Energy Conservation Code within one year of publication by the ICC.

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