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History and development Standard 90-1975 ĭevelopment of Standard 90 began in the aftermath of the 1970s energy crisis. (Other countries have different forms such as Ireland's building energy rating, or Hong Kong's Buildings Energy Efficiency Ordinance) Outside the US, India's Energy Conservation Building Code, has a similar form and scope to ASHRAE 90.1. It is frequently used as a baseline for comparison during energy retrofit projects or any project that employs building performance simulation.
#Ashrae 90.1 pdf code
The California Energy Code (CCR Title 24 Part 6) has a very similar structure and requirements.ĪSHRAE 90.1 is also an industry standard referenced by the USGBC in the LEED building certification program. As of September 2020, 7 states have codes which meet or exceed ASHRAE Standard 90.1-2016 14 states have codes which meet or exceed ASHRAE Standard 90.1-2013 8 states have codes which meet or exceed ASHRAE Standard 90.1-2010 9 states have codes which meet or exceed ASHRAE Standard 90.1-2007 and 8 states have either no statewide code or a code which precedes 90.1-2004.
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Ĭurrent status of adoption into energy codes is tracked by the Building Codes Assistance Project. A few states do not apply any energy conservation standards for their government and commercial buildings. There are some states that use other energy conservation standards for all commercial buildings and some other states that use a combination of the ASHRAE 90.1 standard for all government buildings and use other energy conservation standards for their commercial buildings. Others apply the standard or equivalent standards for all government buildings. Most states apply the standard or equivalent standards for all commercial buildings. Many states apply ASHRAE 90.1 to buildings being constructed or under renovation. Status as an energy code and industry standard Percent improvement over ASHRAE 90.1 is the basis for awarding energy points within the LEED rating system. Building designs will stated their performance as "40% better than ASHRAE 90.1-2007" or "20% better than ASHRAE 90.1-2010". The performance approach is also used to demonstrate design energy efficiency, often expressed as percent better than ASHRAE Standard 90.1. The proposed energy cost budget must be less than or equal to the baseline energy cost budget to achieve compliance. The ECB is expressed in units of dollars.Ī building performance simulation is then performed on the proposed building design. This baseline ECB is established using building performance simulation to model a building with the same size and program as the project building, built according to the prescriptive requirements of ASHRAE 90.1 (sections 5-10). In the performance approach, a baseline energy cost budget ( ECB) is established, based on the building size and program.