• Fantech’s most popular accessory, the backdraft damper, prevents unwanted air from entering through supply/exhaust ports. • Designed for circular ducts • Made from galvanized sheet metal for corrosion resistance • Spring-loaded butterfly blades ensures one-direction flow • Damper blades formed from aluminum H14 • Stainless steel torsion spring • 24 GA, G90 galvanized steel casing • EPBM synthetic rubber gasket • 3/32” diameter brass central rod • Using a backdraft damper will ensure that air can only flow one way. For the residential setting, this can help the homeowner keep the intended pressure scheme intact. All-in-all, this product makes it harder for non-conditioned, outdoor air to enter the living space through cracks or leaks in the home. This further protects individuals from outdoor pollutants and the reentry of unwanted air.
