Model # RD12X8X48

Internet #100185410

Store SKU #208095

null 12 in. x 8 in. x 4 ft. Half Section Rectangular Duct

12 in. x 8 in. x 4 ft. Half Section Rectangular Duct

  • Main trunk line components
  • Durable galvanized steel construction
  • 2 sections equal 1 full joint
$1358 /each
store icon Loading Buying Options...
package icon Loading Buying Options...
Sorry, but we ran into issues loading these options. Please try refreshing.

Frequently Bought Together

Product Overview

Master Flow's sturdy Rectangular Duct is used as the main trunk lines in HVAC supply systems. Two L sections snap together to form the rectangular duct. Sold in "L" sections. Two pieces must be ordered to produce a full section of duct. Drive and "S" Cleats are sold separately. Constructed of 28 Gauge galvanized steel.

  • 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

You will need Adobe® Acrobat® Reader to view PDF documents.  Download a free copy from the Adobe Web site.



Product Depth (in.)
Product Height (in.)
Product Length (in.)
8 in
Product Width (in.)
12 in


Duct Type
Shell Only
Galvanized Steel

More Products With These Features


Customer Questions & Answers

This is 1/2 of a Whole piece of Trunk?

1/2 of a Whole piece of trunk for roughly 14.00 correct? So Roughly 28 for each 4 foot piece? You're competitor whom i would prefer not to shop with sells the entire full piece of trunk for the 14.00 mark? Or am i seeing you're description incorrect?
Asked by: MadZell
Hi MadZell, for this 12 in. x 8 in. x 4 ft. Half Section Rectangular Duct, if ordered on, will be shipped and purchased as it is displayed on The product, per the Product Overview section of the Product page, is sold in Half Sections - 2 pieces needed for complete section of duct and this product is 1/2 of the main rectangular duct. We appreciate your business and look forward to serving you in the future. Thank you for shopping Home Depot!
Answered by: THDSupport
Date published: 2016-07-17

What Gauge is Model # RD12X8X48

PRODUCT OVERVIEW states Model # RD12X8X48 Constructed 28 Gauge galvanized steel. SPECIFICATIONS DETAILS states Gauge 30 Galvanized Steel. What is it?
Asked by: 0ldman
Thank you for contacting MasterFlow ... Our design specifications allow for this item to made in either 28 or 30 gauge steel, which ever is available from our steel supplier at the time of manufacture. Please call Technical Services at 800-211-9612, 8A-5P M-F EST, for more information concerning this issue.
Answered by: Master Flow
Date published: 2015-11-03

Do you need any other pieces in between additional sections? For example I need 8ft of line of ducts do I need anything

Special to connect the 2 four ft pieces together
Asked by: King
  • y_2017, m_7, d_25, h_15CST
  • bvseo_bulk, prod_bvqa, vn_bulk_1.0.0-hotfix-1
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_3
  • loc_, sid_100185410, prod, sort_[SortEntry(order=NUM_ANSWERS, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=BEST_ANSWER_FEEDBACK_COUNT, direction=DESCENDING), SortEntry(order=POSITIVE_ANSWER_FEEDBACK_COUNT, direction=DESCENDING), SortEntry(order=NUM_ANSWERS, direction=DESCENDING)]
  • clientName_homedepot
  • bvseo_sdk, java_sdk, bvseo-3.1.1
  • CLOUD, getContent, 30ms

Customer Reviews

12 in. x 8 in. x 4 ft. Half Section Rectangular Duct is rated 4.3 out of 5 by 3.
Rated 3 out of 5 by from Simple product - be aware for shipping The product is simple and easy to use. You'll want to make sure you align the 2 seams pretty well, or the duct will be twisted. Take your time with it. Easy to cut holes for take-outs and to cut to length. Be aware that they ship them in single wall cardboard boxes, so they will likely arrive with the ends crushed.
Date published: 2013-09-18
Rated 5 out of 5 by from Intake ducking for heating Easy to cut and fold for heating project and exhaust
Date published: 2015-10-13
Rated 5 out of 5 by from got what was expected Got what was expected. Clipped together easily, and fit into the next duct section.
Date published: 2015-07-02
  • y_2017, m_7, d_24, h_22
  • bvseo_bulk, prod_bvrr, vn_bulk_1.0.0-hotfix-1
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_3
  • loc_, sid_100185410, prod, sort_[SortEntry(order=RELEVANCE, direction=DESCENDING)]
  • clientName_homedepot
  • bvseo_sdk, java_sdk, bvseo-3.1.1
  • CLOUD, getContent, 15ms