To some people, a diffuser is just a piece of metal that covers a hole in the ceiling. Occupants don't always understand what the diffuser does; instead, they may see it as the necessary evil that ...

Nothing seems to sell out faster than a top-rated air conditioner on a hot day. Consumer Reports recently rated air conditioners and offered tips on how to trim energy bills while still staying cool ...

Question:We have seven-inch round ducts in the ceiling of our house, for heating and air conditioning. In a little-used room, we’ve never bothered to find ceiling diffusers for them. Now that we’d ...