In order for your traditional central air conditioner or furnace to function, and bring chilled or heated air into your living space, it needs a series of air ducts to do its job. This ductwork is generally made up of sheet metal, however other rigid materials can be used as well, including fiberglass or insulated plastic. There is one component of this ductwork that has a big job, but its name isn’t very well known–the plenum!
There are actually two types of plenums, which are typically in a rectangular shape. The supply plenum is on one side while the return plenum is typically catty-cornered to it. Read on to learn more!