Central Air Conditioning: FAQ

https://gumroad.com/herianongs/p/ten-blunders-house-owners-make-when-purchasing-a-furnace-or-air-conditioner

Central air conditioners distribute cool air through a system of supply and return ducts. Supply ducts and signs up (i.e., openings in the walls, floorings, or ceilings covered by grills) carry cooled air from