Ashrae Envelope Requirements: 8
ASHRAE 90.1-2022 building envelope thermal requirements by climate zone and assembly type — maximum U-values, minimum R-values, maximum SHGC for non-residential construction
| climate zone | assembly type | max U value (Btu/h/ft2/F) | notes |
|---|---|---|---|
| 8 | mass_wall | 0.052 | R-25ci+ minimum |
| 8 | metal_frame_wall | 0.058 | Zone 8: Anchorage AK interior; subarctic extreme |
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