What is supply air plenum?

What is supply air plenum?

The supply plenum is a box that is connected to your HVAC system’s supply outlet. Your AC system’s blower sends cool or warm air into the supply plenum, which is then distributed throughout your home through your ductwork.

What is the purpose of an air plenum?

Plenum boxes are usually situated on either side of the fan or heat exchanger and have the important function of bringing in, distributing, and removing air. They are the air’s first stop after being heated or cooled and its last stop before going back into your AC, heat pump, or furnace.

Where is the supply plenum?

A supply plenum is an enclosed compartment that’s located just after your heat exchanger if you follow the flow of air through your furnace (see below). When your air handler blows air over your system’s heat exchanger, that warm air is directed into the supply plenum.

Do you need a supply plenum?

A: In modern forced-air HVAC systems, you must have a plenum installed.

How long should a supply plenum be?

Single plenums should not exceed 24 ft in length. Double plenums should not exceed 48 ft in total length.

How does a plenum differ from a duct?

A plenum is an air-distribution box attached directly to the supply outlet of the HVAC equipment that heats or cools the air to make the house comfortable. The ductwork that distributes the heated or cooled air to individual rooms of the house connects to the plenum.

How big should a supply plenum be?

Can a supply plenum be too big?

How does a plenum work?

A supply plenum works by taking in the new cool or warm air from the heater or air conditioning system and, in turn, distribute it throughout the building using the HVAC’s ductwork. A return plenum takes in that used air and, using the ductwork, sends it back to the core HVAC system.

What is minimum plenum height?

(50 mm) for the thickness of a suspended ceiling,we see that a minimum height of about 18 in. (460 188 mm), and preferably 20 in. (500 mm), must be added to the thickness of the floor structure and fire-proofing in a typical building to allow for mechanical and electrical services.

What is plenum made of?

Plenum cabling is often made of Teflon and is more expensive than ordinary cabling. In the event of fire, its outer material is more resistant to flames and, when burning, produces less smoke than ordinary cabling. Both twisted pair and coaxial cable are made in plenum cable versions.

What is an open air plenum?

Plenum spaces are the open spaces above the ceiling or below the floor that are used for air circulation. Technically, any ductwork is considered a plenum space too.