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  1. PLENUM Definition & Meaning - Merriam-Webster

    The meaning of PLENUM is a space or all space every part of which is full of matter.

  2. What is Plenum in HVAC and Why It is so Important

    Jun 3, 2025 · 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 …

  3. What is a plenum? HVAC terms explained

    What is an HVAC plenum? A plenum is a box made of sheet metal. It connects your HVAC system’s air handler to your ductwork. Your HVAC system creates cool or warm air depending on the season. …

  4. Plenum space - Wikipedia

    Plenum: a compartment or chamber to which one or more air ducts are connected and that forms part of the air distribution system.

  5. What Does a Plenum Do? Key Functions and Importance in HVAC ...

    Jul 13, 2025 · A plenum is a big part of an HVAC system, but what is the purpose of a plenum? Simply put, it distributes and collects air. It’s the central hub of air flow in a building. This article will cover the …

  6. What is a Plenum in HVAC & Why Is It Important | Anderson Air

    A plenum is an air-distribution chamber in an HVAC system — either supply or return — that helps move and balance airflow through the ductwork. Proper installation and maintenance of the plenum are key …

  7. What Is a Plenum Box in HVAC? A Beginner-Friendly Breakdown

    Aug 20, 2025 · A plenum isn’t one-size-fits-all. The dimensions of your plenum box (such as the 20 x 20 x 36 kit) are chosen based on your system’s airflow needs, measured in CFM (cubic feet per minute). …

  8. PLENUM | definition in the Cambridge English Dictionary

    PLENUM meaning: 1. a meeting at which all the members of a group or organization are present: 2. a meeting at…. Learn more.

  9. Understanding the Role of a Plenum in Your HVAC System

    Mar 20, 2023 · A plenum is essentially the “traffic manager” for air in your HVAC system. It’s a duct or chamber that gathers conditioned air and sends it all over your home or building, making sure every …

  10. What Is a Plenum in HVAC? | Angi

    Aug 20, 2025 · A central HVAC box, the plenum balances and distributes air throughout your home’s duct system. The supply plenum distributes conditioned air evenly into your home’s ducts, while the …