| Product Type: | Damper |
|---|---|
| Motor: | Power Open Automatic |
| Type: | Normally Closed |
| Application: | Air Quality |
| Shape: | Round |
| Size: | 8" |
| Voltage: | 24V |
| Material: | Galvanized Steel |
| Warranty: | 5 Year |

Hello, thanks for writing in. Rigorous cycle testing in extreme temperatures (over 140° F) to simulate attic summer conditions. Functional testing performed at extreme environmental conditions of -40°F/90% RH and 150°F/15% RH.