They may be installed from the HVAC ductwork and therefore are triggered to shut once they feeling smoke. Smoke dampers are often crafted from aluminum and possess a motorized actuator that closes the damper. Backdraft dampers are possibly gravity or motorized. Gravity backdraft dampers utilize the drive of gravity to https://aircontroldampersforengin57901.bloguetechno.com/air-control-dampers-for-hot-climates-an-overview-71621034