Publications

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.

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 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.

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.

DOE Resources and Funding to Support Resilience Work

DOE Webinar: Strategies to Equitably Expand the Energy Codes Workforce
October 19, 2023

DOE Resources and Funding to Support Resilience Work

DOE Webinar: How Building Codes Facilitate Resilient Communities
September 21, 2023

Total System Performance Ratio (TSPR) is a metric for evaluating overall system efficiency instead of individual component efficiency, a solution that could also eventually facilitate the transition to a 100% performance-based code structure. TSPR is a ratio that compares the annual heating and cooling load of a building to the annual energy consumed by the building's HVAC system. This technical documentation provides background on the TSPR and support for the mechanical performance factors that are developed each 90.1 edition cycle to be used in the calculation. The current factors are developed for the 2022 edition of 90.1 in combination with addendum AG.

This document presents a methodology for assessing baseline energy efficiency in new single-family residential buildings and quantifying related savings potential.

Beginning in 2014, the U.S. Department Energy (DOE) funded a series of multi-year residential energy code field studies to explore energy savings opportunities from enhanced code compliance. This report presents the final results across the three phases to assess whether the education and training activities successfully improved code compliance to achieve significant changes in energy use.