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Return Air Plenums

As a furnace operates and blows out air, it must at the same time return to it that same amount of air. A return air plenum is the ducting that is attached to a furnace for that return air to flow through, and is used as a central manifold for other return air ducting. Your order will also include Alpine's exclusive free instructional video on DVD! Watch as a pro quickly assembles the return air plenum, and shows you how to do the same. You'll have all your questions answered as you see how fast and extrememly easy it is to put together. Plenum assembles in about 5 minutes. NOTE: Return air plenums are only available for purchase with equipment orders- such as furnaces, heat pumps or air conditioners - since their packaging requires they be delivered on a pallet.
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  • Alpine AG-RPL2014

    20 x 14 Return Air Plenum

    $ 146.99

    Or as low as /mo

    (7 Reviews)
  • Alpine AG-RPL2016

    20 x 16 Return Air Plenum

    $ 146.99

    Or as low as /mo

    (7 Reviews)
  • Alpine AG-RPL2514

    25 x 14 Return Air Plenum

    popular
    $ 165.99

    Or as low as /mo

    (7 Reviews)
  • Alpine AG-RPL2516

    25 x 16 Return Air Plenum

    popular
    $ 168.99

    Or as low as /mo

    (7 Reviews)
  • Alpine SBFD30

    30 Inch Wide Return Air Support Box With Filter Slot

    popular
    $ 176.99

    Or as low as /mo

    (3 Reviews)
  • Alpine SBFD30-100-244

    30 Inch Wide Return Air Support Box and Plenum Kit With Filter Slot

    $ 299.99

    Or as low as /mo

    (3 Reviews)
  • Alpine SBFD36

    36 Inch Wide Return Air Support Box With Filter Slot

    $ 194.99

    Or as low as /mo

    (1 Review)