The ADF is an Automatic Damper used to prevent flow through the connector when the heating appliance is off. It is also used to balance the draft in a boiler connector where multiple boilers are venting into a single, common chimney.
| Available Sizes (ID) | 6" to 36" (150mm to 900mm) |
| Material | Stainless Steel 316L |
| Actuator | Brushless DC Motor |
| Power | 120VAC or 24VAC/VDC |
| Torque | 22 in-lbs (2.5 Nm) |
| Speed | 90° in 75 Sec. / Fail-Safe in 25 Sec. |
| End Switches | 1 |
| Temperature Rating | 1400°F (760°C) / 1800°F (980°) intermittent |
| Warranty | 2-year Factory Warranty |
| Listing/Certification | UL 378 Standard for Draft Equipment ULC/ORD-C378 |
