Table of Contents
What are return plenums?
The return plenum is a box that connects the return ducts in your ductwork back to your HVAC system. The air is then sent back into your HVAC system through a return inlet to be put through another cycle of cooling or heating.
What is a plenum chamber and what does it do?
A plenum chamber is a pressurised housing containing a fluid (typically air) at positive pressure. One of its functions is to equalise pressure for more even distribution, compensating for irregular supply or demand.
What are plenums in HVAC?
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.
What are duct plenums?
A plenum is an air distribution box designed for forced-air systems on residential homes and commercial businesses. It is part of the ductwork, but far different than an air duct as these important boxes handle air as it enters the ducts and helps to recirculate it within a system.
Why do we use plenum in HVAC?
Plenum boxes are used to distribute heated or cooled air throughout your home’s interior. After producing heated or cooled air, the HVAC system must move that air through the ductwork. Plenum boxes take in this air so that it can be pumped into the ductwork and, therefore, distributed throughout your home’s interior.
What is a plenum duct?
How does plenum ventilation work?
a system of mechanical ventilation in which fresh air is forced into the spaces to be ventilated from a chamber (plenum chamber ) at a pressure slightly higher than atmospheric pressure, so as to expel foul air.
Are plenums necessary?
Q: Is a plenum necessary? A: In modern forced-air HVAC systems, you must have a plenum installed.
What is a plenum slab?
An underfloor plenum is the open space between a structural concrete slab and the underside of a raised access floor system. Commonly used as the service plenum for distributing power, voice, and data cabling, in UFAD systems supply air is also delivered through this space.
How does an air plenum work?
What is a return plenum and how does it 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. That air is recycled as a fresh batch later.
Why is there an air filter in the return plenum?
You will oftentimes find air filters in the return plenum, because the air that’s currently in your room is pulled in through this section of your system. The air is then sent back into your HVAC system through a return inlet to be put through another cycle of cooling or heating.
What is a supply plenum in HVAC?
Supply 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 via your ductwork. Image Courtesy of Building America Solution Center
What in the world is a plenum?
Today’s topic, Plenums. What in the world is a plenum, you ask? For starters, remember that there are typically two types of plenums in your central air conditioning system’s ductwork, the supply plenum and return plenum. Let’s take a look at how each of these components plays an important role in the air distribution throughout your home.