Fire dampers are fireplace-shielding units which might be employed inside HVAC techniques. They're meant to end the fire from spreading through the ducts. In a set temperature, the fireplace damper shuts and kinds a barrier that prevents the fireplace from spreading with the ducts. Manual dampers are altered by hand https://car-park-ventilation12334.blognody.com/40338615/examine-this-report-on-air-control-dampers-for-engine-sheds