Publications

Summary of the findings of the 2003 Residential New Construction Baseline Study conducted by Itron, Inc. under Pacific Gas & Electric (PG&E) management.1 KEMA-Xenergy conducted the on-site surveys. The RNC baseline study investigates energy efficiency in newly constructed single family homes throughout California. The study’s primary purpose is to provide information to residential new construction (RNC) program managers across the state, thereby allowing them to assess and address the effect of recent energy code changes on these programs.

From August 1997 to September 1999, one hundred new Arkansas homes were evaluated in two areas in the state where there was significant building activity in order to determine the energy performance of current building practices. One of the positive findings was that homes are now being built significantly tighter than a few years ago. Homes built in the early to in.id 1990's were experiencing an average of 0.5 natural air changes per hour (NACH), an acceptable level considered normal for new construction Only 24 homes in this evaluation had leakage rates exceeding 0.4 NACH; the majority of homes (58 percent) had leakage rates of 0.35 and under.

This document is intended to be a reference manual for the Appendix G Performance Rating Method (PRM) of ANSI/ASHRAE/IES Standard 90.1-2019 (Standard 90.1-2019).

The Department of Energy (DOE) Building Energy Codes Program (BECP) periodically evaluates national and state-level impacts associated with energy codes in residential and commercial buildings. 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. 

This report describes solutions to the common PRM adoption challenges, including calculating energy savings by fuel type and electricity demand savings relative to current code and avoiding “fuel switching” when reporting savings of the proposed design relative to the current code. The calculations described in this technical support document are automated in the ASHRAE Standard 90.1 Performance Based Compliance Form and the Compliance Form Companion Tool

November 16, 2023 - Building Energy Codes Webinar Series: What You Need to Know About the New Energy Standard for Commercial Buildings: ASHRAE 90.1-2022 presentation.

The State of Michigan is in the process of updating its current state residential energy code, which is an amended version of the 2015 International Energy Conservation Code (IECC) to the 2021 IECC. The Michigan Bureau of Construction Codes, a bureau within Licensing and Regulatory Affairs (LARA), requested a cost-effectiveness analysis, that considers the Michigan Stille-Derossett-Hale Single State Construction Code Act,1 comparing the current state residential energy code to the unamended 2021 IECC.

The resulting analysis shows that a home designed to comply with the residential provisions of the 2021 IECC would yield short-term and long-term consumer benefits compared to a home built to the Michigan-amended 2015 IECC.

This is to certify that the State of New York intends to adopt an updated version of the State Energy Conservation Construction Code (the “NYS Energy Code”) and the State of New York is seeking an extension from the Secretary pursuant to 42 U.S.C. §6833(c) in light of the fact that the State has made a good faith effort to comply with such requirements and has made significant progress in doing so. The updated version of the NYS Energy Code is anticipated to become effective in 2025.

With regard to commercial buildings, the Department of State has reviewed the provisions of the State’s commercial building code regarding energy efficiency and seeks an extension of time to update the NYS Energy Code’s provisions to meet or exceed the requirements of ASHRAE 90.1-2019 for eighteen (18) months or until January 28, 2025.

This letter hereby to certifies that the State of Oregon has adopted the 2023 Oregon Residential Specialty Code (ORSC with energy efficiency provisions exceeding those of the 2021 International Energy Conservation Code ( I C C ) for low-rise residential buildings. 

This letter certifies that Minnesota has reviewed the provisions of its residential building code regarding energy efficiency and made a determination as to whether it is appropriate for Minnesota to revise its residential energy code. The letter further certifies that Minnesota has reviewed and updated the provisions of its commercial energy code.

The commercial IECC prototype building models were developed by Pacific Northwest National Laboratory in support of the U.S. Department of Energy's (DOE's) Building Energy Codes Program. These prototype buildings were derived from DOE's Commercial Reference Building Models. The prototype models include 16 building types in 19 climate locations for for recent editions of the IECC. Also included is a scorecard for each prototype building. The scorecard is a spreadsheet that summarizes the building descriptions, thermal zone internal loads, schedules and other key modeling input information.

EnergyPlus TMY3 weather file for climate location associated with the IECC Prototype Building Models.

EnergyPlus TMY3 weather file for climate location associated with the IECC Prototype Building Models.

EnergyPlus TMY3 weather file for climate location associated with the Manufactured Housing Prototype Building Models.

The ASHRAE Standard 90.1 prototype building models were developed by Pacific Northwest National Laboratory in support of the U.S. Department of Energy's (DOE's) Building Energy Codes Program. These prototype buildings were derived from DOE's Commercial Reference Building Models. The prototype models include 16 building types in 19 climate locations for recent editions of ASHRAE Standards 90.1. Also included is a scorecard for each prototype building. The scorecard is a spreadsheet that summarizes the building descriptions, thermal zone internal loads, schedules and other key modeling input information.

EnergyPlus TMY3 weather file for climate location associated with the IECC Prototype Building Models.

EnergyPlus TMY3 weather file for climate location associated with the IECC Prototype Building Models.

EnergyPlus TMY3 weather file for climate location associated with the IECC Prototype Building Models.

EnergyPlus TMY3 weather file for climate location associated with the IECC Prototype Building Models.

EnergyPlus TMY3 weather file for climate location associated with the IECC Prototype Building Models.

EnergyPlus TMY3 weather file for climate location associated with the IECC Prototype Building Models.

EnergyPlus TMY3 weather file for climate location associated with the Manufactured Housing Prototype Building Models.

EnergyPlus TMY3 weather file for climate location associated with the IECC Prototype Building Models.

EnergyPlus TMY3 weather file for climate location associated with the Manufactured Housing Prototype Building Models.

EnergyPlus TMY3 weather file for climate location associated with the IECC Prototype Building Models.