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3.25 in. x 10 in. x 5 ft. Half Section Rectangular Stack Duct

$1584
  • Used for HVAC systems or range hood venting between wall studs
  • Durable galvanized steel construction
  • Notched corners to easily connect sections
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Product Details

Master Flow's Rectangular Stack Duct is used for HVAC system applications between wall studs as supply and return ducts, and to vent range hoods, kitchen and bath fans between walls as well . Installing rectangular duct between wall studs saves space, and is an easy way to route air up or down a wall and to other stories of a home. It also works in overhead spaces between floor joists or in attics. Sold in "L" sections. Two pieces must be ordered to produce a full section of duct.
  • Sold in Half Sections - 2 pieces needed for complete section of duct
  • Sections easily snap together with no tools necessary
  • Can be cut to needed length with simple tin snips (not included)
  • Notched corners for easily connecting sections, or use cleats (cleats not included)
  • Always seal seams with code-approved mastic, sealant or duct tape (not included)
  • Install with sheet metal screws (not included)
  • Return Policy

Additional Resources

From the Manufacturer

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Specifications

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Questions & Answers

4Questions
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Q:Do I need anything else to connect 2 sections of this duct together to get 10' of duct?
by|Oct 22, 2020
2 Answers
Answer This Question

A:  Yes, two more pieces.

by|Dec 24, 2020

A:  These have notched corners for easily connecting sections, or use cleats (cleats not included model #CS60). If you have any other inquiries about our Master Flow products please call Technical Services at 800-211-9612.

by|Oct 22, 2020
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    Q:Do I have to order 2 of these to create 1 section of duct?
    by|Oct 22, 2020
    2 Answers
    Answer This Question

    A:  Yes. Each is a half section so you need two of them.

    by|Jan 6, 2022
    2 found this answer helpful

    A:  Yes, these are sold in Half Sections - 2 pieces needed for complete section of duct 5 ft long. If you have any other inquiries about our Master Flow products please call Technical Services at 800-211-9612.

    by|Oct 22, 2020
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      Q:Will this be suitable for venting a window air conditioner,being installed to an inside wall to an outside wall window ?
      by|Jul 28, 2016
      3 Answers
      Answer This Question

      A:  Absolutely not do not hang an outside air conditioner window unit inside your house it will not work

      by|Jun 2, 2020

        A:  This is recommended for HVAC duct-work, not exhaust for an appliance. If you have any other inquiries about our Master Flow products please call Technical Services at 800-211-9612.

        by|May 7, 2019

          A:  I think this size would be too small.

          by|Mar 3, 2020
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            Q:How do you hang from a finish cealing? I'm trying to use to vent my microwave.
            by|Mar 2, 2016
            2 Answers
            Answer This Question

            A:  Additional information is needed before answering your question. Please call our Technical Services group for assistance, at 800-211-9612 M-F 8A-5P ET.

            by|Mar 4, 2016

              A:  I would use a C shaped bracket that is the length of the width of the duct, plus an extra inch on each end to bend down to attach to the duct. Attach it to the ceiling first then and attach the ears of the bracket to the duct. This would give a concealed mounting.

              by|Mar 3, 2020
                Showing 1-4 of 4
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                Customer Reviews

                4.2 out of 5
                (62)
                • 4.2
                  out of 62 reviews
                • 88%recommend this product
                Filter by:
                Showing 1-10 of 62 reviews
                This Half Section Rectangular Stack Duct was perfect fit for my project. I was able to cut a hole...
                This Half Section Rectangular Stack Duct was perfect fit for my project. I was able to cut a hole to install my outtake fan so i can get rid of the hot air inside my garage. It worked really well, very high quality product for the price paid. I got 2 pieces and they worked well together connecting the two pieces were easy and painless.
                by
                • Recommended
                4 found this review helpful
                Multiple uses
                Being in the hvac industry, this product has more than one use. It's typical to install in walls, between floors for supply or venting. I was able to use as complete hood vent in my current operation. I've assembled the rectangular duct, Cut out 3'' x 5' area on the 3 1/4" side of duct, then attached two 8" square to round boots to the 10" side of duct. I can now pull a vacuum across our 5' table.
                by
                • Verified Purchase
                • Recommended
                3 found this review helpful
                Happy to habe gounf thod
                I needed an adapter to connect a new microwave oven to an existing duct. I used this pre-bent sheet metal to make an adapter box. It was exactly what I needed.
                by
                • Verified Purchase
                It was a good product to use, I was...
                It was a good product to use, I was able to customize a duct flashing that turned out perfectly.
                by
                Response from Master FlowOct 28, 2022
                Thank you for the feedback. Glad you were satisfied with your Master Flow purchase. MasterFlow
                • Verified Purchase
                by
                • Verified Purchase
                by
                • Verified Purchase
                Rating provided by a verified purchaser...
                Rating provided by a verified purchaser
                by
                Response from Master FlowSep 16, 2022
                Thank you for the feedback. Glad you were satisfied with your Master Flow purchase. MasterFlow
                • Verified Purchase
                by
                • Verified Purchase
                Very easy to install. Light weight, good quality...
                Very easy to install. Light weight, good quality
                by
                Response from Master FlowJul 12, 2022
                Thank you for the feedback. Glad you were satisfied with your Master Flow purchase. MasterFlow
                • Verified Purchase
                poorly bent/poor qualit control
                I hate that I have to write a review, but I find more and more companies selling poor products. So a lot of reviews are good, and some are bad. Here's why. The duct itself is "technically" okay. I ordered a few boxes, only 4 halves out of 30 or so properly mate/snap together properly, the others don't snap together due to poorly placed bends, and as a result, the duct ends up being roughly 10.25" wide and loose. That's hilarious in a terrible way. This one's on me I suppose.
                by
                Response from Master FlowJun 17, 2022
                Sorry for your experience. We have not had poor results from this product although we would like to thank you for your concerns. MasterFlow
                  Showing 1-10 of 62 reviews

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