Backdraft dampers are meant to prevent backdrafts in HVAC devices. They are mounted in exhaust ducts to stop the reverse move of air. Backdraft dampers are frequently installed in regions wherever detrimental tension may well manifest, like loos and kitchens. Rapid Track Transport - As minimal as 10 working suggests https://aircontroldampersforengin24455.blazingblog.com/36617152/how-air-control-dampers-for-hot-climates-can-save-you-time-stress-and-money