Internet #100396934

Model #F6IFD4X300

Store SKU #394317

Store SO SKU #1000683795

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

  • R6 fiberglass insulation is perfect for heating and A/C systems
  • Galvanized core wire resists rust and corrosion
  • Insulated duct can withstand up to 200°F
  • See More Details

Frequently Bought Together

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Price:
$2787

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.
  • R6 fiberglass insulation for greater insulating power
  • 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
  • Duct can be cut to length as needed
  • Insulated duct features a maximum temperature rating of 200°F
  • Always install per instructions and seal using approved mastic or sealant (or approved tape)

Info & Guides

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BrandEverbiltMaster FlowMaster FlowMaster Flow
Name4 in. x 25 ft. Flexible Foil Duct4 in. x 25 ft. Insulated Flexible Duct R6 Silver Jacket7 in. x 25 ft. Insulated Flexible Duct R6 Silver Jacket10 in. x 25 ft. Insulated Flexible Duct R6 Silver Jacket
Price
$1891
$2787
$3437
$4774
Ratings
(52)
(956)
(956)
(956)
InsulatedNoYesYesYes
Maximum air flow (CFM)030150400
MaterialAluminumFiberglassFiberglassFiberglass
Product Diameter (in.)4 in4710
Insulation R-Value 666
View ProductView ProductView ProductView Product

Specifications

Dimensions

Product Depth (in.)
300
Product Diameter (in.)
4
Product Height (in.)
7.5
Product Length (in.)
300
Product Width (in.)
7.5
Wall Thickness (in.)
1.75

Details

Color
Silver Jacket
Insulated
Yes
Insulation R-Value
6
Insulator material
Other
Material
Fiberglass
Maximum air flow (CFM)
30
Returnable
180-Day

Warranty / Certifications

Certifications and Listings
ETL Listed,UL Recognized

Questions & Answers

198Questions81Answers

Can this duct be use for bathroom exhaust fan

Asked by Anton May 1, 2018
10
Answers

That is what I used it for. It solved the condensation issues we were having in the winter with our bath fan. Worked so great that I told the builder that he should used this versus the uninsulated type in the first place!

Can this be used for dryer venting through an attic?

Asked by Jim May 2, 2020
9
Answers

I’m sure it would work, but be careful routing the ducting through an are where you don’t have easy access. I suspect you’ll get a lot of link build-up inside the duct, and blowing out onto your roof as well. It working fine for venting my bathroom ceiling fan (humid air), but it might be less suitable for a dryer vent.

what type of recommend adhesive material or tape to secure this to the vent?

Asked by Duc May 16, 2018
9
Answers

Use a heavy duty tie strap and Mastic. Apply mastic on the inside and outside of ductwork. https://www.homedepot.com/p/Gardner-Bender-36-in-Plenum-Cable-Tie-25-Pack-49-536P/308665649 https://www.homedepot.com/p/Speedi-Products-1-2-Gal-Water-Base-Duct-Mastic-Sealant-AC-DMS-0-5/202907021

Will this fit 3 inch exhaust fan? I have bath fans that are 3 inch and apparently the smallest o...

Asked by Moe October 10, 2019
8
Answers

Look for a 3in to 4in plastic or galvanized adapter with the household ductwork items. This will allow for a proper fit both to the exhaust fan and the insulated flexible duct.

Can this be used in an over a stove range exhaust hood?

Asked by Tallman June 24, 2019
8
Answers

No! It is not for anything like that.

Can the inner flex duct be removed easily from the insulated jacket, so it can be slipped over a rigid metal duct?

Asked by Jim March 23, 2019
8
Answers

yes it can . I used a metal coupler on mine!

I need an insulated 5 inch diameter exhaust hose for my Portable Air Conditioner, (PAC). The thin...

Asked by NorthIdahoGal July 16, 2018
8
Answers

My PAC hoses were 5" on the outside. I cut pieces of this the same length as my fully extended hoses then pulled the inner core out of the fiberglass jacket. It is not bonded to the fiberglass in any way. I removed one end connector, slipped the original hoses inside the jacket, reinstalled the end connector, and used zip ties to secure the jacket on each end. In other words I just used the neat fiberglass tube to cover my original hoses. Works great. It doesn't look fabulous but hey, neither do the hoses without the silver wrap.

Can this be cut onto 2 separate pieces

Asked by Jon0001 February 26, 2018
7
Answers

Our Flexible duct can be cut to the size needed. If you have any other inquiries about our Master Flow products please call Technical Services at 800-211-9612.

can this be used under my house to replace heating and air condition ductng

Asked by duct May 26, 2018
7
Answers

Yes, flexible duct is convenient for use in multiple applications including heating and A/C systems. If you have any other inquiries about our Master Flow products please call Technical Services at 800-211-9612.

Can you use this for microwave venting?

Asked by DC April 11, 2018
7
Answers

I have always hard piped microwaves, used this product for bath exhaust fans!

4 in. x 25 ft. Insulated Flexible Duct R6 Silver Jacket - page 2

Customer Reviews

  • 956 Customer Reviews
  • 4.7 out of 5 stars overall
95% of customers recommended.
Overall Ratings
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Easy to work with. Does exactly what it is supposed to. I had two 25 ft sections. Used about 20...
Easy to work with. Does exactly what it is supposed to. I had two 25 ft sections. Used about 20 ft for one duct and attached the remaining 5 ft to the other full 25 ft section for a second needed duct. Had to stretch it a bit so as to not have to buy another 25 ft. Would have liked it if it came in greater than 25 ft sections - maybe 30 or 40 ft length.
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Should've gotten the R8 flex but this works
Should've gotten the R8 flex but this works
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I replaced my home entire HVAC duct system and I'm glad I did because my AC is working like a cha...
I replaced my home entire HVAC duct system and I'm glad I did because my AC is working like a charm. Master Flow DUCTS are quite inexpensive and seem durable compared to my old duct work..
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Easily maneuvered, installed, sealed. Zip ties and foil tape worked perfectly for securing this d...
Easily maneuvered, installed, sealed. Zip ties and foil tape worked perfectly for securing this ductwork .
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I liked it.
I liked it.
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It really was very easy to unpack and install, I appreciate that you hold things in an efficient ...
It really was very easy to unpack and install, I appreciate that you hold things in an efficient and simple way to get the job done
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Following an upstairs flood, I had to replace my air duct since a lot of water went down the old ...
Following an upstairs flood, I had to replace my air duct since a lot of water went down the old air duct. This duct, plus a couple of zip-ties made an easy job! To cut it, I used a box-cutter knife, plus a pair of wire cutters when I got to the coiled wire of the duct. If needed, a little extra silver/foil duct tape can help ensure it doesn't leak air around the seal, sort of a belt & suspenders approach to ensuring the duct doesn't slip off the zip-tie connections.
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Excellent stuff it's a much better value than the more expensive similar models by other brands I...
Excellent stuff it's a much better value than the more expensive similar models by other brands I actually didn't use for its intended use, I cut in half the long way and wrapped around steam pipes. It was 1/3 the price of official pipe insulation! 10" tube was perfect for 50' of 4" steam pipe, 8" tube was perfect for 50' of 3" steam pipe. The trick to getting it to fit nice without compressing the Rvalue from 6 to 4 was peeling in half from 1.5 to 0.75" and wrapping around gently twice (also why as shown in the photo the pink glass stayed on the pipe until I put on the silver foil) Alternatively you can cut into long strips 1/4 of the width and spiral around the pipe if you curl gently enough you can maintain the 1.5" of the R6.
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With the freakishly cold weather we've been having this winter, we developed a problem with water...
With the freakishly cold weather we've been having this winter, we developed a problem with water vapor freezing inside our regular plastic ducting that connected the bathroom vent fan up through the attic and out through the roof. When the ice would melt, water would drip back out of the vent fan and make a mess in the bathroom. We removed the old plastic ducting (along with the 10 lb chunk of ice that was inside it - wow!) and replaced it with this. It was easy to connect since the inside is the same size as the regular cheapo plastic ducting. And since switching, we have not had any more dripping so I assume it is doing its job. The only problem is that 25 feet of this is WAY more than we needed and it didn't come in smaller lengths. So now we have a pile of leftovers which I suppose we'll use if any of our other bathroom fans have the same issue in the future. Anyhow, this did the job for a reasonable price and now we can sit on the toilet without getting dripped on - what more could you ask??
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It was well insulated. Easy to work with.
It was well insulated. Easy to work with.
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