0050206922446

Model F6IFD8X300

Internet #100396936

Store SKU #685764

Store SO SKU #755578

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

$30.98 /each
  • R6 fiberglass insulation for greater insulating power
  • Duct can be cut to length as needed

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Product Overview

The Master Flow 8 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

9 Questions12 Answers

Customer Questions & Answers

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

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3 answers

is the outer jacket of this insulation a vapor barrier ?

This question is from 8 in. x 25 ft. Insulated Flexible Duct R6 Silver Jacket
Asked by
greenville sc
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August 31, 2015
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Answers (3)

Asked by
Grand Junction, CO
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December 9, 2015
Answer: 
from my reading, yes it is. be sure to use an appropriate tape to join and seal the ends
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September 1, 2015
Answer: 
Thank you for contacting MasterFlow ... Yes, the Mylar outer material is moisture resistant. Please call Technical Services Group at 800-211-9612.
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September 1, 2015
Answer: 
Yes, the outer jacket is a vapor barrier.
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2 answers

will 8" insulated flex duct go over 8" rigid metal duct?

This question is from 8 in. x 25 ft. Insulated Flexible Duct R6 Silver Jacket
Asked by
GJ Colo
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December 6, 2015
I want to insulate the 1970's sheet metal duct in my craw space and it would be very convenient to just run 25' lengths of insulated flex duct over the existing by means of dismantling the existing sections and running them through the flex and reinstalling them. Other options are as expensive and do not seem to insulate as well.
Thanks for any input.
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Asked by
Grand Junction, CO
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December 9, 2015
Answer: 
Well i went ahead and gave it a try anyways and it was rather easy. You just need to remove the flex duct out of the box and let it expand. I cut the 25' section that came in the box into 15' and a 10' section, seemed like it would be easier, it was. I put duct tape along the front rim of each five foot section in turn and carefully pushed/pulled the flex duct over the sheet metal section which included Read More
Well i went ahead and gave it a try anyways and it was rather easy. You just need to remove the flex duct out of the box and let it expand. I cut the 25' section that came in the box into 15' and a 10' section, seemed like it would be easier, it was. I put duct tape along the front rim of each five foot section in turn and carefully pushed/pulled the flex duct over the sheet metal section which included mastiff over the long seam. I attached the next section of sheet metal duct with low head profile screws, aluminium tape and slid the next section on. Easier than i thought it would be. Now one run is done, only 6 more to go. Read Less
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December 8, 2015
Answer: 
Thank you for inquiring about MasterFlow Products ... The 8 in. flex duct probably will not fit over the 8 in. metal pipe. The galvanized steel core is 8 in. in diameter and would be an easy fit. I would suggest using the 8 in Duct Sleeve (5 feet long) which is designed to slide over the existing metal pipe or replace the old metal pipe with 8 in. flex duct. Please contact our Technical Services Group at Read More
Thank you for inquiring about MasterFlow Products ... The 8 in. flex duct probably will not fit over the 8 in. metal pipe. The galvanized steel core is 8 in. in diameter and would be an easy fit. I would suggest using the 8 in Duct Sleeve (5 feet long) which is designed to slide over the existing metal pipe or replace the old metal pipe with 8 in. flex duct. Please contact our Technical Services Group at 800-211-9612, M-F 8A-5P ET, with any additional questions. Read Less
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2 answers

Question about the diameter

This question is from 8 in. x 25 ft. Insulated Flexible Duct R6 Silver Jacket
Asked by
Aurora Ohio
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November 23, 2015
when it says four, six, or eight inch is it referring to the interior diameter of the pipe or the exterior diameter of the insulation?

I want the interior to be six, what should I buy?
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Asked by
Grand Junction, CO
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December 9, 2015
Answer: 
When it says it is 6" the is the inside diameter. So buy 6". BTW, it will have enough room to go over the crimped and the un-crimped joiner or pipe you will be working with.
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November 24, 2015
Answer: 
Thank you for inquiring about MasterFlow Products ... The diameter listed as the inside of the pipe. 6 inch flex duct would be the size you need to order for a 6 inch diameter. Please contact our Technical Services Group at 800-211-9612, M-F 8-5 ET, with any additional questions.
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2 answers

can this ducting be cut down to a smaller length?

This question is from 8 in. x 25 ft. Insulated Flexible Duct R6 Silver Jacket
Asked by
Mission Viejo, CA
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September 21, 2015
I only need a 6" ducting. Can this 25" be cut to a shorter length with ease?
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Asked by
Grand Junction, CO
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December 9, 2015
Answer: 
yes, you will need something to cut the very thin plastic film and a wire cutter to cut the thin wire that holds the duct open. Of course you will need to cut the fiberglass and outside cover with a razor knife
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September 24, 2015
Answer: 
Thank you for contacting MasterFlow ... Yes, You will need a pair of wire cutters and large scissors or sharp knife. Use the wire cutters to cut the wire at your desired length, then cut the section from the main body with the scissors or knife. Please call Technical Services at 800-211-9612, M-F 8A-5P EDT, with any additional questions.
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Customer Reviews

Rated 4.8 out of 5 by 13 reviewers.
Rated 5.0 out of 5.0 by Finally got my cool room! In a recent room addition to our home, we noticed the new room was not cooling as well as the others. They had added a 6 inch flex duct to the new room, while all the others in the house were 8 inch. My husband and I went to Home Depot to see what our options were to improve air flow to the new room. A wonderful employee, Danny, soon greeted us and recommended we change the flex duct to an 8 inch. He helped us select the products that we would need including the 8 inch flex duct. I installed the new duct and could immediately feel the difference in air flow. I now have a "cool" new room! July 28, 2014
Rated 5.0 out of 5.0 by 8 in. x 25 ft. Insulated Flexible Duct R6 Silver Jacket It worked as expected. Easy to install and looks great. April 5, 2016
Rated 5.0 out of 5.0 by Flexible and easy to use I used various sizes of Master Flow Flexible ductwork when installing my furnace. The 8 inch ductwork is as tough and flexible as the 12 and 7 inch sizes. When installing this ductwork on Master FlowStarting collars, installation is fast and very secure. The ductwork is very flexible and able to snake through tight spaces. I definitely recommend this ductwork. September 29, 2013
Rated 5.0 out of 5.0 by Flex ducts Had steel ducts before , replaced it with insulated flex duct because sound would transmit like kids tin can telephone from room to room, now eliminated 100 %.Well worth it December 8, 2015
Rated 5.0 out of 5.0 by Great product just needs to be offered in shorter lengths I am happy with the product but disappointed I couldn't buy it in shorter lengths. I recently did a remodel and needed to move an HVAC line. This required an 8ft length to be added for a reroute. Unfortunately I could only by 25 foot sections at 60.00 a pop. I understand a HVAC company or wholsaler not offering shorter lengths but Home Depot is said to cater to the home owner, which I am. I wasn't to thrilled spending so much for a section I have seen a hundred times in a dumpster after a new build. Homedepot please consider selling more reasonable quantities. Product great but way more than I needed. I recommend you do the same as you do for wire spools, charging a premium for smaller rolls. You can still make your money and I can still save mine. January 14, 2014
Rated 5.0 out of 5.0 by easy to use I saved over $60 buying this online and having it delivered than if I had bought it locally in our small town. It is as described and worked as expected, who could ask for anything more? It was fun opening it up as it was packed tightly in a box like a slinky and came out like a Jack in the box. October 28, 2014
Rated 5.0 out of 5.0 by Excellent product I was a bit wary of flexible ducting as some of the existing, older, flex duct in my attic was torn and crushed. I had intended to replace this with round metal duct and then insulate the outside of it. However, I spoke to a friend in the HVAC business and he said that flex duct is now the standard for short (less than 12 ft.) runs. He said that it is actually fine for longer runs provided it is run straight and pulled taut to remove slack. Armed with this advice I purchase some of the 8 in. duct. The installation was a snap - took me about 15 minutes. It would have taken me at least 2 or 3 hours to run and insulate metal duct. Provided you use zip ties and plenty of foil tape at your connections, this product is very sturdy and effective. I intend to replace my remaining round ductwork with this product prior to having my attic insulated with blown-in insulation. October 1, 2009
Rated 5.0 out of 5.0 by this product worked as advertised. this was easy to install,and has worked well with no issues. May 13, 2014
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