This 12-inch round damper sleeve provides manual airflow control and balancing for compatible HVAC duct systems. The internal damper blade can be adjusted from the exterior to increase, reduce, or balance airflow through the connected duct run.
The 1.5-inch stand-off raises the adjustment control away from the sleeve surface, providing additional operating clearance and helping keep the control accessible in compatible insulated duct installations. The galvanized steel sleeve is suitable for residential and commercial supply-air, return-air, and ventilation systems.
Sizing Note: The 12-inch measurement identifies the nominal round duct connection diameter. Confirm the required duct size before ordering.