Model # F6IFD4X300

Internet #100396934

Store SKU #394317

Store SO SKU #1000683795

null 4 in. x 25 ft. Insulated Flexible Duct R6 Silver Jacket
0050206922064

4 in. x 25 ft. Insulated Flexible Duct R6 Silver Jacket

  • R6 fiberglass insulation for greater insulating power
  • Duct can be cut to length as needed
$24.25 /each

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Product Overview

The Master Flow 4 in. x 25 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. The duct is ETL listed, meeting the UL181 standard.

  • Flexible duct is convenient for use in multiple applications including heating and 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
  • Insulated duct features a maximum temperature rating of 200 degrees F
  • Always install per instructions and seal using approved mastic or sealant (or approved tape)

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Customer Questions & Answers

18 Questions33 Answers

Customer Questions & Answers

4 in. x 25 ft. Insulated Flexible Duct R6 Silver Jacket
4 in. x 25 ft. Insulated Flexible Duct R6 Silver Jacket

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5 answers

Can you cut this duct to size - if I need only 17 of the 25 feet?

This question is from 4 in. x 25 ft. Insulated Flexible Duct R6 Silver Jacket
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May 25, 2016
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Answers (5)

Asked by
Oneida, NY
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Home Improvement Profile: DIYer
June 1, 2016
Answer: 
Yes. Can be cut to size. Just peel back insulation and clamp flexible tubing onto outlet or whatever other connection you have. Then fold insulation back into place. Works great.
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May 31, 2016
Answer: 
Yes, wire cutters to cut the steel core and large scissors to cut the fiberglass insulation and Mylar covering. Please call Technical Services with any additional questions. M-F 8A-5P EDT.
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Asked by
Kansas City, Mo.
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May 28, 2016
Answer: 
You can cut it easily yourself with a razor knife and a pair of wire cutters for the wire that runs through the center duct.
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May 26, 2016
Answer: 
Yes, you can cut this duct to size.
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Asked by
Florida
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May 26, 2016
Answer: 
Absolutely. You just need a knife and a wire cutting plier.
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3 answers

What is the suggested vent cover for this duct?

This question is from 4 in. x 25 ft. Insulated Flexible Duct R6 Silver Jacket
Asked by
Nebraska
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November 3, 2015
I need to vent two bathroom fans out and the soffit seems like the best choice. Is there a certain brand or model of vent (that keeps debris and bugs out) that will fit well with this ducting?
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Asked by
Horseheads, NY
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December 12, 2015
Answer: 
Is your soffit vented (has small holes in it)? If so, using a soffit vent to exhaust a bathroom fan is not recommended. The purpose of the vented soffit is to pull cooler air into your attic as the hotter air travels out the ridge vent. If you exhaust the moist air from your bathroom out the vented soffit, it will be pulled back into the attic and possibly cause mold problems.
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November 5, 2015
Answer: 
Thank you for your interests in MasterFlow Products ... I would suggest the Bathroom Exhaust Eave Vent model # BFEV4. See Home Depot for pricing and availability. For additional information, call Technical Services Group at 800-755-9392, M-F 8A-5P ET.
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Asked by
Kansas City, Mo
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November 4, 2015
Answer: 
They don't officially suggest one, and carry a couple, but my strong suggestion would be for you to do a search on Home Depot's site for EX-EVML 04 Very small holes, and the price is a bargain.
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3 answers

Can this be turned into 2 pieces?

This question is from 4 in. x 25 ft. Insulated Flexible Duct R6 Silver Jacket
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November 3, 2015
I need about two 8 foot runs. I just want to make sure the ends are not fabricated and that the entire length is meant to be utilized... Thanks
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Asked by
Huntsville
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January 24, 2016
Answer: 
Absolutely! Use a razor knife or shears to cut the outer insulation, then a pair of wire cutters. I did just that with my recent install for two bathroom exhaust fans. Easy Peasy!
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November 5, 2015
Answer: 
Thank you for your interests in MasterFlow Products ... This product can cut to any length then attached to the termination point or using the Flex Connector (FC) attach to another section of flex ducting. For additional information, call Technical Services Group at 800-755-9392, M-F 8A-5P ET.
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Asked by
Kansas City, Mo
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November 4, 2015
Answer: 
This should work perfectly for your needs. Just be careful when you make your cut, so as to not mangle it.
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3 answers

Can I use this duct to extend my outdoor electric dryer vent outside where the steam will clear my patio cover?

This question is from 4 in. x 25 ft. Insulated Flexible Duct R6 Silver Jacket
Asked by
Olympia, WA
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August 1, 2015
Need to try and prevent dryer steam from collection on the underside of my patio cover causing mold.
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Asked by
Crystal River, Fl
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August 12, 2015
Answer: 
If would not use this in a horizontal way because when the steam cools down and reverts back to water you'll have water in the tubing and that is not a good thing. If you could this tubing in a vertical way and through the roof using a roof vent, this would be a good thing. I would also try to keep the tubing as short and straight as possible to connect to the roof vent. A word of caution though, DO NOT Read More
If would not use this in a horizontal way because when the steam cools down and reverts back to water you'll have water in the tubing and that is not a good thing. If you could this tubing in a vertical way and through the roof using a roof vent, this would be a good thing. I would also try to keep the tubing as short and straight as possible to connect to the roof vent. A word of caution though, DO NOT install it horizontal and to the underside of the eave. You'll get moisture sucked back into the eave vents and mold will develop on the inside of the attic. If you go to YouTube and watch Tom Silver "Installing a Roof Vent" or simply follow this link. Have a good day.
https://www.youtube.com/watch?v=PqrZWd_CQIE
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Asked by
Kansas City, Mo
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August 3, 2015
Answer: 
Yes, it would probably work, but keep in mind, that the longer your vent hose, the harder it will be to get your clothes dry. In my house, we just connect a pair of pantyhose to our dryer, held on by a hose clamp, and the lint gets collected in the hose, and the air/steam vents out into our basement. In our case, it doesn't cause any problems, and if need be, you could always vent the basement in another Read More
Yes, it would probably work, but keep in mind, that the longer your vent hose, the harder it will be to get your clothes dry. In my house, we just connect a pair of pantyhose to our dryer, held on by a hose clamp, and the lint gets collected in the hose, and the air/steam vents out into our basement. In our case, it doesn't cause any problems, and if need be, you could always vent the basement in another manner. Used pantyhose is cheap or free, and once it gets full, you dispose of it and replace. We tried several vents, and had problems with damp lint clogging up, or steam build-up. They also make indoor lint collectors for venting dryers as well. Best of luck to you! Read Less
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August 3, 2015
Answer: 
Thank you for contacting MasterFlow ... Our insulated flexible ducting is not recommended for outdoor installation or in direct sunlight applications.
Please call Technical Services at 800-211-9612 with any additional questions.
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Customer Reviews

Rated 4.6 out of 5 by 36 reviewers.
Rated 5.0 out of 5.0 by Product arrived on time. Its just flex-duct, so I can't really say anything 'exciting'. October 25, 2016
Rated 3.0 out of 5.0 by Good but only needed 6' Should be sold in 5, 10, 20, etc sections as I only needed 6' September 5, 2016
Rated 5.0 out of 5.0 by Great Product and Excellent Value I bought this to use on a new bath ventilation fan. The ducting for the previous fan not insulated. The builder simply buried it under the sprayed insulation. I looked on the HD website and was amazed that this insulated ducting was a much better value then plain ducting. I only used about half the ducting so I have more for when I do the other bath fan. This duct is easy to work with and appears to be high quality. April 30, 2015
Rated 5.0 out of 5.0 by Easy fix for bathroom vent fans Contractor built house and used flimsy plastic venting for bath fan and vented it to roof eaves. Started to get condensation in pipe and water stains around ceiling vent. Bought this insulated pipe and replaced old pipe. Then vented thru outside wall. This insulated pipe is 25' long, more than enough to suit almost any situation. Well insulated and easy to secure with worm gear clamps. March 15, 2016
Rated 5.0 out of 5.0 by good deal This 25' insulated duct was really a cheaper buy than uninsulated ducts, especially for the length as I could not find 25' uninsulated. And I needed every bit of that 25 feet. December 10, 2013
Rated 5.0 out of 5.0 by easy duct work for diyer The ductwork was completed as desired with little experience and knowledge of what to do February 10, 2016
Rated 5.0 out of 5.0 by Doing it right Had to properly vent two bathroom exhaust fans outside of the attic. Original installers only had it venting into the attic. The 25ft was enough to complete both exhausts. January 24, 2016
Rated 1.0 out of 5.0 by worse building product I have ever used. By far the worst building product I have ever used. While the insulation is good, the flexible tubing was nearly impossible to fit over fan and vent connections. The tube would tear extremely easily leaving a black sticky substance on the connections. In hind sight, I should have removed the flexible tubing entirely and replaced it with the 25 year old uninsulated flexible duct I was replacing. December 8, 2015
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