Backdraft dampers are meant to reduce backdrafts in HVAC units. They are mounted in exhaust ducts to circumvent the reverse move of air. Backdraft dampers usually are put in in regions exactly where damaging pressure may occur, such as bogs and kitchens. Manual dampers, Alternatively, are adjusted by hand. This https://aircontroldampersforengin78901.blazingblog.com/36558581/new-step-by-step-map-for-air-control-dampers-for-hot-climates