Model # IRB12X6X8

Internet #100115419

Store SKU #814203

Store SO SKU #1000684692

null 12 in. x 6 in. to 8 in. Insulated Register Box

12 in. x 6 in. to 8 in. Insulated Register Box

  • Use to connect pipe or insulated flex duct to register grille
  • Durable galvanized steel construction
  • Pre-insulated, no need to wrap
$1538 /each
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Frequently Bought Together

Product Overview

The Master Flow 12 in. x 6 in. x 8 in. Insulated Register Box is designed for durability. This register box is made of zinc-coated, 30-gauge galvanized steel. The 1 in. fiberglass insulation helps reduce HVAC system noise and absorb condensation for a quiet and efficient system. This register box can be installed with sheet metal screws.

  • Made of zinc-coated, 30 gauge-galvanized steel
  • Pre-insulated no need to wrap
  • 1 in. fiberglass insulation lining and vapor barrier helps absorb HVAC system noise and control condensation
  • R4 insulating value
  • Always seal seams with code approved mastic, sealant or duct tape
  • Install with sheet metal screws

Info & Guides

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Product Depth (in.)
Product Height (in.)
Product Width (in.)


Brand/Model Compatibility
HVAC application
All HVAC types
Product Weight (lb.)

Warranty / Certifications

Manufacturer Warranty
Free from Manufacturer Defect at Time of Delivery.

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Customer Questions & Answers

Can this be used as a floor register

Asked by: Rod
Yes, this can be used as a floor register.
Answered by: CommunityAnswer
Date published: 2016-02-16

The rectangular side is 12"x6", while the round side is an 8" diameter, right?

Asked by: DIY

In new construction, is the ideal installation time after insulation and before drywall, or before insulation?

Asked by: DIY

Can this be used as a dead register to allow passive heat flow from ceiling of ground floor to the second floor?

New construction
Asked by: DIY
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Customer Reviews

12 in. x 6 in. to 8 in. Insulated Register Box is rated 5.0 out of 5 by 4.
Rated 5 out of 5 by from This register was esqusitly beautiful, an made a great anniversary... This register was esqusitly beautiful, an made a great anniversary gift to my wife. A chain fits thru it nicely, and she wears it everywhere! I will buy another on for my boyfriend.
Date published: 2017-03-17
Rated 5 out of 5 by from Works as designed! Found no flaws with it, great value/pricepoint for DIY & sturdy so I didn't have to worry about having to be gentle. I didn't kick it or throw it, so if you abuse it I'm sure it won't stand up to it but that wouldn't be the product's fault. It's just sheet metal after all. Used to add a second supply vent to a spare bedroom that just wasn't cooling! Room is so much better now.
Date published: 2017-07-12
Rated 5 out of 5 by from Great Register Box. I used two of these register boxes to replace the old one's, They fit perfectly, and being insulated was an upgrade to the system. Neat!
Date published: 2015-09-29
Rated 5 out of 5 by from Easy Installation Product arrived as described. Satisfied with quality
Date published: 2014-06-29
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