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| Term | Description |
|---|---|
| Air-impermeable insulation | An insulation having an air permeance equal to or less than 0.02 L/s-m2 at 75 Pa pressure differential tested according to ASTM E2178 or E283. |
| Term | Description |
|---|---|
| Air-impermeable insulation | An insulation having an air permeance equal to or less than 0.02 L/s-m2 at 75 Pa pressure differential tested according to ASTM E2178 or E283. |