Products Architectural Louvers, Dampers, Roof Curbs, Actuators, Grilles, Sunshades and more. DampersBackdraft DampersBlast DampersRectangular DampersRectangular Industrial DampersH-420 - Heavy Duty, Flanged, All Steel, up to 10" w.g.AH-620 - Opposed Blade, Heavy Duty, Flanged, Steel Frame, Aluminum Airfoil Blades, up to 13" w.g.H-620 - Heavy Duty, Flanged, All Steel, up to 20" w.g.NAH-720-1 - Opposed Blade, Heavy Duty, Flanged, All Steel, Airfoil Blades, up to 20" w.g.NAH-720-2 - Opposed Blade, Heavy Duty, Flanged, All Steel, Airfoil Blades, up to 30" w.g.NAH-720-3 - Opposed Blade, Heavy Duty, Flanged, All Steel, Airfoil Blades, up to 35" w.g.NAH-720-4 - Opposed Blade, Heavy Duty, Flanged, All Steel, Airfoil Blades, up to 40" w.g.AH-621 - Parallel Blade, Heavy Duty, Flanged, Steel Frame, Aluminum Airfoil Blades, up to 13" w.g.NAH-721-1 - Parallel Blade, Heavy Duty, Flanged, All Steel, Airfoil Blades, up to 20" w.g.NAH-721-2 - Parallel Blade, Heavy Duty, Flanged, All Steel, Airfoil Blades, up to 30" w.g.NAH-721-3 - Parallel Blade, Heavy Duty, Flanged, All Steel, Airfoil Blades, up to 35" w.g.NAH-721-4 - Parallel Blade, Heavy Duty, Flanged, All Steel, Airfoil Blades, up to 40" w.g.Jackshafting - Rectangular Industrial DampersMaintenance - Rectangular Industrial DampersRound DampersRound Industrial DampersSmall Motorized Rectangular DampersSmall Motorized Round Dampers Balancing / Regulating Dampers UV Products Iris Dampers Drop Plenum Diffusers Louvers Dampers UL Listed Dampers Roof Curbs and Rails Sunshades Architectural Grilles Ventilators Doors Actuators Fans Air Measuring Products VAV Terminals Security Bars & Grilles Plenums Duct Take-Offs Custom Work Manufacturer Cross Referencing System View Now Previous Next