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.
International Energy Conservation Code (2009)
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adopted the 2009 IECC with Montana amendments as the statewide energy code, effective March 26, 2010, until it was superseded by the 2012 edition.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.
- Administration
This chapter outlines the administrative requirements for the International Energy Conservation Code, covering scope, alternative materials, documentation, inspections, fees, and appeals.
- Climate Zones
This chapter defines climate zones for buildings, sets interior design temperatures for heating and cooling, and specifies identification requirements for materials, systems, and equipment.
- Commercial Energy Efficiency
This chapter sets forth energy efficiency requirements for commercial buildings, addressing aspects such as building envelope, mechanical systems, service water heating, electrical power, and overall building performance.
- Definitions
This chapter defines key words and terms used throughout the code to ensure consistent interpretation and application of its requirements.
- Referenced Standards
- Residential Energy Efficiency
This chapter outlines mandatory and prescriptive energy efficiency requirements for residential buildings, including thermal envelope, HVAC systems, and lighting.