It differs from property insurance in that a property insurance policy only covers the physical damage to the business, while the additional coverage allotted by the business interruption policy covers the profits that would have been earned.
Definition of forced air Forced air heating refers to room-level or floor-level heating which is distributed by fans next to electric coils that radiate heat. It does not apply to fuel-generated heat which is forced through ducts into various rooms.
Return Plenum. Forced-air systems also have return ducts that connect to the HVAC equipment through an air-collection box known as a return plenum. As freshly conditioned air is blown out of the room supply ducts, âusedâ air from the rooms is sucked into the return ducts.he ductwork that distributes the heated or cooled air to individual rooms of the house connects to the plenum. The HVAC equipment has a blower that forces heated or cooled air into the supply plenum and from the plenum into the rooms through the supply duct system.