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International Energy Conservation Code

The 2009 International Energy Conservation Code, adopted as Montana's statewide energy code under the Administrative Rules of Montana (Title 24, Chapter 301), effective March 26, 2010.

Direct answer and reference scope

International Energy Conservation Code is presented here as a reference within the IECC 2009 collection for Montana. The 2009 International Energy Conservation Code, adopted as Montana's statewide energy code under the Administrative Rules of Montana (Title 24, Chapter 301), effective March 26, 2010. Use the Montana Department of Labor and Industry to confirm the code edition currently adopted for the project, and compare the model text with state amendments, local amendments, effective dates and the permit authority's interpretation. The ICC code library is the model-code publication path. This Harth page is a searchable reference transcription, not an official code publication, legal opinion or confirmation that this edition controls a particular address. Record the project jurisdiction, application date, occupancy, construction type and amendment set before relying on a section. Where this page conflicts with an official publication or the authority having jurisdiction, the official source controls.

Authored and prepared by Harth. Review scope: official verification path added; code text and current local applicability have not been independently reviewed.

Montana adopted the 2009 IECC with Montana amendments as the statewide energy code, effective March 26, 2010, until it was superseded by the 2012 edition. It covers minimum energy-efficiency requirements for the building envelope, mechanical systems, lighting, and service water heating. The full text below is reproduced from the 2009 edition as adopted into law, sourced from public.resource.org.

Where verbatim source text is shown, it is reproduced from the code as adopted into law by the jurisdiction, sourced from public.resource.org under the government edicts doctrine (see Georgia v. Public.Resource.Org, Inc., 590 U.S. 255 (2020)). This material reflects enacted law and is provided for reference and educational purposes only. It is not legal advice and may not reflect local amendments or the most recently adopted edition. Always verify requirements with the authority having jurisdiction.