17.75" Barometric Damper automatically opens when cooler is on and closes off the duct when cooler is turned off. High grade aluminum frame and vanes with nylon hinges and weatherstripping insulation...
17.75" Barometric Damper automatically opens when cooler is on and closes off the duct when cooler is turned off. High grade aluminum frame and vanes with nylon hinges and weatherstripping insulation...
FREE SHIPPING to Continental US | Use in round sheet metal ductwork to limit flow of supply air. Affix inside duct at desired angle and fasten for permanent air dampening.Sheet metal will come in 30...