Model # RD3.25X10X60

Internet # 100120222

Store SKU # 939117

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

$8.98 /each

Frequently Bought Together

Product Overview

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)

Info & Guides

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Product Depth (in.) 
Product Height (in.) 
Product Length (in.) 
3.25 in 
Product Width (in.) 
10 in 


Duct Type 
3.25 x 10 
Galvanized Steel 

Warranty / Certifications

Certifications and Listings 
No Certifications or Listings 

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Customer Questions & Answers

1 Question1 Answer

Customer Questions & Answers

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

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1 answer

How do you hang from a finish cealing? I'm trying to use to vent my microwave.

This question is from 3.25 in. x 10 in. x 5 ft. Half Section Rectangular Stack Duct
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March 2, 2016
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Answer (1)

March 3, 2016
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.
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  • 2016-07-25 T20:57:47.403-05:00
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Customer Reviews

Rated 5.0 out of 5 by 1 reviewer.
Rated 5.0 out of 5.0 by 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. December 26, 2013
  • 2016-07-27 T02:13:01.743-05:00
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