Use Volume Control Durable Dampers to control the airflow in existing ductwork. The revolutionary design allows them to be installed through a hole in the ductwall 1 1/2" in diameter. The simple 5-minute installation time drastically reduces labor cost!
* Coated for rust protection
* Virtually eliminates vibration and reduces noice
Item available in PA, Zip Code 15063 and CA, Zip Code 95240
