it is an mechanical device is used to distribute air throughout a home or building. It is used with a heat pump or air conditioning system. Or may be install indoor or outside of house. The cooling process begins when fresh air from outside is fed...
A duct damper is a device used within a heating, ventilation and air conditioning (HVAC) duct. These ducts carry air from furnace or air conditioning units to the different rooms within the building. A duct damper can help control the flow of this...