0050206029244

Master Flow

Model # F8IFD8X300

Internet # 202562741

Store SKU # 812305

Store SO SKU # 755578

8 in. x 25 ft. Insulated Flexible Duct R8 Silver Jacket

$46.95 /each

Frequently Bought Together

Product Overview

The Master Flow 8 in. x 25 ft. Insulated Flexible Duct R8 Silver Jacket is used in standard Heating and Air Conditioning (HVAC) systems and some venting applications. The duct has R8 insulation which contains 50% 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.

  • R8 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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Specifications

Dimensions

Product Depth (in.) 
300 
Product Diameter (in.) 
8.0 in 
Product Height (in.) 
12 
Product Length (in.) 
300 in 
Product Width (in.) 
12 

Details

Color 
Silver Jacket 
Insulated 
Yes 
Insulation R-Value 
Insulator material 
Other 
Material 
Fiberglass 
Maximum air flow (CFM) 
200.0 
Returnable 
90-Day 

Warranty / Certifications

Certifications and Listings 
2-UL Recognized,ETL Listed 

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Customer Questions & Answers

3 Questions4 Answers

Customer Questions & Answers

8 in. x 25 ft. Insulated Flexible Duct R8 Silver Jacket
8 in. x 25 ft. Insulated Flexible Duct R8 Silver Jacket

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2 answers

Installation over existing hard duct

This question is from 8 in. x 25 ft. Insulated Flexible Duct R8 Silver Jacket
Asked by
Michigan
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November 16, 2015
Can this product be safely installed over existing hard ductwork? I am wanting to use it to insulate an existing duct in a crawlspace.
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Answers (2)

Asked by
Los Angeles
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Home Improvement Profile: DIYer
April 15, 2016
Answer: 
I haven't tried it for a long length but the insulation sleeve easily fit over the section of duct that I pulled it over. I think that it can work if you just take out the core.
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November 17, 2015
Answer: 
Thank you for inquiring about MasterFlow Products ... Take a look at the Duct Wrap product (Model # INSWRP60) , this R6 insulation wraps around the existing HVAC pipe without removing the pipe or the Duct Sleeve product (available in 6 or 8 inch Model # INSLV6 / Model # INSLV8) which slides over the HVAC existing pipe. It would be to difficult to try to use the flexible duct as a wrap or sleeve. Please Read More
Thank you for inquiring about MasterFlow Products ... Take a look at the Duct Wrap product (Model # INSWRP60) , this R6 insulation wraps around the existing HVAC pipe without removing the pipe or the Duct Sleeve product (available in 6 or 8 inch Model # INSLV6 / Model # INSLV8) which slides over the HVAC existing pipe. It would be to difficult to try to use the flexible duct as a wrap or sleeve. Please contact our Technical Services Group at 800-211-9612, M-F 8-5 ET, with assistance with any additional questions. Read Less
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1 answer

Does this product meet California / San diego building code

This question is from 8 in. x 25 ft. Insulated Flexible Duct R8 Silver Jacket
Asked by
San Diego, Ca.
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June 14, 2016
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Answer (1)

June 16, 2016
Answer: 
This product meets all of the national and state codes. Individual city codes will have to investigated individually. Please call Technical Services at 800-211-9612, M-F 8A-5P EDT, for additional information.
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1 answer

How much dose this bag of flex weigh?

This question is from 8 in. x 25 ft. Insulated Flexible Duct R8 Silver Jacket
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January 26, 2016
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Answer (1)

January 27, 2016
Answer: 
one box of 8" flex weighs approximately 18 pounds. Please call MasterFlow Customer Care at 800-755-9392, M-F 8A-5P ET for any additional information.
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Customer Reviews

Rated 4.9 out of 5 by 7 reviewers.
Rated 5.0 out of 5.0 by great product and easy to use Recently bought this and it was easy to install. Before using this product there was an aluminuim pipe and as soon as I installed this in the attic for a return vent, the HVAC unit was working less and the tempreture inside the house was dropping mich faster. Worth spending the extra $16 to get the R8 silver jacket. June 6, 2016
Rated 5.0 out of 5.0 by Home Owner DIY Product arrived quickliy via UPS and was relatively simple to intall as a non-contractor DIY fix. May 22, 2016
Rated 4.0 out of 5.0 by It's Insulated Duct. What can you say about insulated duct? It is used in homes starting at the furnace plenum. Wish that weren't true. In many cases it doesn't need to be insulated since basements are often finished.In my opinion, the length should be limited to 15 feet by code in conditioned spaces but no one seems to have a clue about hard piped duct anymore in residential and not all the pieces needed are sold by the Home Depot to do that kind of work properly.. One big negative is that people crush the insulated flex duct to get around some clearance issue where rectangular hard duct would solve the problem. Then they wonder why the room gets hot or cold. So the product is okay and the insulation seems to be good quality (and is now thicker and more effective in attics). No reason not to buy it. Make sure you connect it properly with tie wraps in addition to foil tape and also one or two screws through the tie wrap to make it even better. That is what folks do in commercial work. And consider "saddles" and the correct strapping to prevent restrictions where the duct sags. March 24, 2015
Rated 5.0 out of 5.0 by works great Works great keeps a great air flow from one room to the next. June 18, 2014
Rated 5.0 out of 5.0 by Exactly as expected Great ductwork, exterior sheath is very strong, and stood up to prodding into place with a broom stick no problem. Used this along with airtec / rectorseal diffusers to install jump ducts to solve an hvac pressure relief issue in the master bedroom. Didn't want to undercut the door due to privacy. This ductwork & those diffusers made it a diy project & saved me hundreds over the quotes I got. March 27, 2012
Rated 5.0 out of 5.0 by this product has great features great product and quality I recemend easy to work with October 2, 2012
Rated 5.0 out of 5.0 by great insulation Came in ahead of time.looks like a quality product November 22, 2011
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