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ASHRAE 90.1 — Energy Standard

Updated Mar 26, 2026
Energy standard for commercial buildings covering building envelope, HVAC, service water heating, power, lighting, and renewable energy. Referenced by IECC as compliance path. Sets minimum efficiency requirements.
TAGS
ASHRAEenergyefficiencyIECCcommercial
DETAILS
number
90.1-2022
category
Energy — Commercial
standard body
ASHRAE
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