Master Flow 4 in. x 12 ft. Insulated Flexible Duct R6 Silver Jacket-F6IFD4X144 - The Home Depot

Master Flow

Model # F6IFD4X144

Internet # 203420974

Store SKU # 398907

4 in. x 12 ft. Insulated Flexible Duct R6 Silver Jacket

Master Flow 4 in. x 12 ft. Insulated Flexible Duct R6 Silver Jacket

This item has been discontinued.
The Home Depot no longer carries this specific product.

$16.99 / each


Model # F6IFD4X144

Internet # 203420974

Store SKU # 398907

Store SO SKU # 755578

The Master Flow 4 in. x 12 ft. Insulated Flexible Duct R6 Silver Jacket is used in standard Heating and Air Conditioning (HVAC) systems and some venting applications. The duct has R6 insulation which contains 33% more insulation than the standard R4.2 product. This additional insulation provides greater thermal efficiency to save energy. The product is also covered in a heavy duty, silver jacket for durability. It can be used for venting bath fans where insulation is required. The duct is ETL listed, meeting the UL181 standard.

  • R6 Fiberglass insulation for greater insulating power
  • Flexible duct is convenient for use in multiple applications including heating & A/C systems and some venting
  • Oversized core to connect quickly and easily to standard sheet metal fitting
  • Galvanized core wire for greater corrosion resistance vs. non-galvanized wire
  • Duct can be cut to length as needed
  • Insulated duct features a maximum temperature rating of 200 degrees Fahrenheit
  • Always install per instructions and seal using approved mastic or sealant (or approved tape)

Info & Guides

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Assembled Depth (in.)  144 in  Assembled Height (in.)  8 in 
Assembled Width (in.)  8 in  Product Diameter (in.)  4 in 
Product Length (in.)  144 
Color  Silver Jacket  Insulated  Yes 
Insulator material  Other  Material  Fiberglass 
Maximum air flow (CFM)  60  R Value 
Returnable  90-Day 
Warranty / Certifications
Certifications and Listings  2-UL Recognized,ETL Listed 


Rated 4.0 out of 5 by 4 reviewers.
Rated 4.0 out of 5.0 by It does its job Its insulation, what can I say, it insulates. I only used the insulation and the outside skin. I removed the inner coil because I was insulating some rigid dryer duct. I would never use this stuff as it was intended unless I could pull the inner coil really snug because all of those ridges would really decrease air flow because of friction. I probably would have given it 5 stars but I feel that the inner coil material is too thin. October 21, 2014
Rated 4.0 out of 5.0 fine product but... Fine product but wish it could be bought in shorter length. I have 8 feet left over. I will probably use it later and it doesn't eat anything so... April 2, 2013
Rated 4.0 out of 5.0 by Good quality, worth doing right. For the little bit it costs compared to uninsulated, go with what you know you should to do your project right. Product was easy to work with and good quality. March 28, 2014
Rated 4.0 out of 5.0 by Solved My Problem I had a bath fan vent that was just a thin flexible plastic duct with no insulation. Condensation from the vent had caused water stains on my bathroom ceiling. I replaced it with this insulted flexible duct and expect no more water stains. January 31, 2014
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