ASHRAE 90.1-2022 — Commercial Energy Standard

Updated Mar 25, 2026

Commercial building energy: envelope, HVAC efficiency, lighting power density. Three compliance paths.

Wall R-13+7.5ci Zone 4, roof R-30ci, windows U-0.36. Economizers ≥54kBtu/h. Energy recovery ≥75% OA. DCV for >500sf/>25 people. LPD: office 0.79, retail 1.05, classroom 0.71 W/sf. Paths: prescriptive, trade-off, performance model.

TAGS

ASHRAE-90.1 energy-code commercial HVAC lighting

DETAILS

code year

2022

code section

ASHRAE 90.1-2022

SOURCES

🔗https://www.ashrae.org/technical-resources/standards-and-gui...

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