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20 in. x 20 in. Duct-board Return Air Box

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  • Usable as a return box for household venting systems
  • R6 insulation protects the attached grille from heat and cold
  • Easy to attach or detach with industrial gaffer tapes
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Product Details

About This Product

The Duct-board Return Air Box is an R6 insulated box that installs traditionally in a ceiling. Can accept any size collar up to 18 in. Diameter (not included). Used as a central return vent box (Filter Grill Not included). Can be easily cut to size. Product is "knocked down" for shipping and must be assembled.

Highlights

  • Easily assembles using foil tape (Assembly required)
  • Provides accommodation for return air filter grills
  • Easy, more flexible, installation
  • R-6 insulation
  • Overall assembled size: 23 in. x 23 in. x 7.5 in
  • Interior dimensions: 20 in. x 20 in. x 6 in.
  • Return Policy

Product Information

Internet # 203613224

Model # DRAB20X20

Additional Resources

Shop All Master Flow
From the Manufacturer

Specifications

Dimensions: H 4.5 in, W 22.5 in, D 21.5 in

Dimensions

Product Depth (in.)21.5 inProduct Height (in.)4.5 in
Product Length (ft.)21.5 ftProduct Thickness (in.)2 in
Product Width (in.)22.5 in

Details

InsulatedYesInsulation R-Value6
Insulator materialOtherMaterialFiberglass
Maximum air flow (CFM)0Returnable90-Day

Warranty / Certifications

Certifications and ListingsNo Certifications or Listings

Questions & Answers

11Questions
caret
Q:What isle is it usually in?
by|Dec 17, 2023
0 Answer
Answer This Question
caret
Q:Can you use this inside of the furnace for insulation? What's the best way to secure it inside of furnace? Thanks
by|Mar 9, 2023
1 Answer
Answer This Question

A:  No, we do not recommend using this product inside of a furnace. If you have any other inquiries about our Master Flow products please email, warrantyllbp@gaf.com

by|Mar 10, 2023
    caret
    Q:What is the total square footage?
    by|Feb 14, 2022
    1 Answer
    Answer This Question

    A:  It comes with 4 pieces of approximately 6" x 20 " and 1 piece approximately 23" x 23" duct board If you have any other inquiries about our Master Flow products please email warrantyllbp@gaf.com .

    by|Feb 14, 2022
      caret
      Q:Is there a 20 x 20 x 24" version???
      by|Sep 30, 2021
      1 Answer
      Answer This Question

      A:  No, there is only the 6" height(interior). If you have any other inquiries about our Master Flow products please email warrantyllbp@gaf.com or call Technical Services at 800-211-9612, Mon- Fri, 8 am 5 pm EST.

      by|Oct 1, 2021
        Showing 1-4 of 11

        Customer Reviews

        3.6 out of 5
        • 3.6 out of 7 reviews
        • 50% recommend this product
        Filter by:
        Showing 1-7 of 7 reviews
        Easy to install
        I bought two of them to install additional air returns. Even though it was the first time in my life I did this type of work I found it very easy to install. Using utility knife I cut it to size and then fixed pieces in place using duct foil.
        by
        • DIY
        • Recommended
        5 found this review helpful
        Rating provided by a verified purchaser...
        Rating provided by a verified purchaser
        by
        • Verified Purchase
        Will not meet code, don't waste your time!
        Purchased in a pinch make-up a new return air box. The duct board is not properly cut in that it does not have foil tails which are needed to "securely fasten" (i.e. outward clinch staple) it closed prior to application of approved tape (or mastic). Reference IRC M1601.4.1 Joints, seams and connections or a NAIMA video. Bottom line, a user will need to cut and make the finished box smaller to enable it to be assembled to properly satisfy code. I could not reduce the size of the box for my application so I returned it.
        by
          1 found this review helpful
          Good product a little off center but some extra tape...
          Good product a little off center but some extra tape made for what I needed
          by
          • Verified Purchase
          Rating provided by a verified purchaser...
          Rating provided by a verified purchaser
          by
          • Verified Purchase
          The box came fully assembled not in individual pieces like...
          The box came fully assembled not in individual pieces like shown or described .
          by
          • Verified Purchase
          Easy to assemble. Seemed flimsy at first but with extra...
          Easy to assemble. Seemed flimsy at first but with extra tape it became more solid. Holds up well with at home cut in back for duct.
          by
          • Verified Purchase
          1 found this review helpful
          Showing 1-7 of 7 reviews