Model # F6IFD4X144

Internet #203420974

Store SKU #398907

Store SO SKU #1000128581

Master Flow 4 in. x 12 ft. Insulated Flexible Duct R6 Silver Jacket
0050206031445

Master Flow

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

$16.99 /each

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Product Overview

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)

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Customer Questions & Answers

3 Questions4 Answers

Customer Questions & Answers

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

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2 answers

Why should I use an insulated jacket versus one without.

This question is from 4 in. x 12 ft. Insulated Flexible Duct R6 Silver Jacket
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March 26, 2016
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Asked by
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October 24, 2016
Answer: 
Insulation minimizes the change in temperature of the air flowing through the pipe. The goal is to avoid condensation on the interior and/or exterior of the pipe as this type of condensation is a potential cause of mold formation and damage to the surrounding structure.
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April 28, 2016
Answer: 
You would want to use insulated jacket when routing the duct through an unconditioned space (attic).
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2 answers

Can the inner flexible duct be slid out of the insulation sleeve and discarded?

This question is from 4 in. x 12 ft. Insulated Flexible Duct R6 Silver Jacket
Asked by
Ann Arbor, Michigan
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January 25, 2016
I would like to use the outer insulation sleeve on 4" aluminum tubing that will be used to vent a bathroom fan in my attic. Perhaps this would be easier than using insulation to wrap the 4" aluminum tubing. Any advice or comments would be appreciated. Thank you.
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October 24, 2016
Answer: 
I used this duct for a bathroom fan and the inner duct was not directly adhered to the insulation though I would have to wonder how much damage might occur to the insulation when pulling it over a pipe.
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January 26, 2016
Answer: 
No, the two shells are glued together to create a singular tube. Please call MasterFlow Technical Services at 800-211-9612 with any additional questions or concerns for the use of this product.
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4" duct NuTone fan; must I use 4" flexible duct? Fan 110cfm; flex duct 60cfm. Will this limit efficiency from 110 to 60?

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September 22, 2016
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Customer Reviews

Rated 4.0 out of 5 by 9 reviewers.
Rated 3.0 out of 5.0 by Okay vent hose - nice insulation I would say that this is an ok product. I had a problem with the inner jacket ripping. It would have been nice if it was the same foil material as the dryer vents. Be very careful and leave plenty extra in case ripping occurs. That being said the insulation is ok and I would use this again. July 5, 2016
Rated 2.0 out of 5.0 by Comes up short on length This product claims to be 12 feet in length. You can only achieve this length if you stretch the product to full capacity, which is not ideal for the proper install. May 24, 2016
Rated 5.0 out of 5.0 by No regrets! Used this product when I installed new 4" exhaust fan that ran through attic to roof vent. Spend the few extra bucks and get this insulated duct to prevent condensation from forming and running back down to fan and ceiling. Seems to be well made and should function as intended. Good price, accurate description, no regrets! December 28, 2015
Rated 5.0 out of 5.0 by Does the job The ducting was just what the web page says it is, so I am satisfied. It was easy to cut and install. It fit tightly over the existing aluminum duct, but was easy to get on. September 8, 2015
Rated 5.0 out of 5.0 by Just what I needed. I only needed a piece about 4 feet long. The smallest piece available was this 12 foot piece. It was perfect for my needs though, just had to cut off what I needed. August 25, 2015
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 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
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
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