Ashrae Envelope Requirements: 7
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 |
|---|---|---|---|
| 7 | mass_wall | 0.071 | R-19.0ci minimum; very cold |
| 7 | metal_frame_wall | 0.058 | Zone 7: Duluth MN Fairbanks AK threshold; subarctic |
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