Architectural Louvers, Dampers, Roof Curbs, Actuators, Grilles, Sunshades and more.


Opposed Blade, Heavy Duty, Flanged, All Steel, Airfoil Blades, up to 40" w.g.


The Model NAH-720-4 is an extremely heavy duty industrial steel airfoil control damper that is rated up to 40" w.g. This damper has 3/8" galvanized steel frame and 12 gauge double skin construction airfoil blades. The NAH-720-4 can also be manufactured in all stainless steel construction.