$8763
- R8 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
- View More Details
How to Get It
Product Overview
The Master Flow 6 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 200F
- Always install per instructions and seal using approved mastic or sealant (or approved tape)
Compare Similar Flexible Ductwork
 |  |  |  | |
| Brand | Thermaflex | Master Flow | Master Flow | Master Flow |
| Name | KP 14 in. x 25 ft. HVAC Ducting - R4.2 | 6 in. x 25 ft. Insulated Flexible Duct R8 Silver Jacket | 7 in. x 25 ft. Insulated Flexible Duct R8 Silver Jacket | 8 in. x 25 ft. Insulated Flexible Duct R8 Silver Jacket |
| Price | $5150 | $8042 | $8200 | $9455 |
| Ratings | (37) | (305) | (304) | (305) |
| Insulated | Yes | Yes | Yes | Yes |
| Maximum air flow (CFM) | 5586 | 100.0 | 150 | 200.0 |
| Product Diameter (in.) | 14 in | 6 | 7 | 8 |
| Insulation R-Value | 4.2 | 8 | 8 | 8 |
| Material | Fiberglass | Fiberglass | Fiberglass | Fiberglass |
| Product Length (in.) | 300 | 300 | 300 | 300 |
| Product Depth (in.) | 25 | 300 | 300 | 300 |
| Product Width (in.) | 17 | 10.5 | 11.5 | 12.5 |
| Product Height (in.) | 17 | 10.5 | 11.5 | 12.5 |
| View Product | View Product | View Product | View Product |
Specifications
Dimensions
| Product Depth (in.) | 300 | Product Diameter (in.) | 6 |
|---|---|---|---|
| Product Height (in.) | 10.5 | Product Length (in.) | 300 |
| Product Width (in.) | 10.5 | Wall Thickness (in.) | 2.25 |
Details
| Color | Silver Jacket | Insulated | Yes |
|---|---|---|---|
| Insulation R-Value | 8 | Insulator material | Other |
| Material | Fiberglass | Maximum air flow (CFM) | 100.0 |
| Returnable | 90-Day |
Warranty / Certifications
| Certifications and Listings | ETL Listed,UL Recognized |
|---|
Questions & Answers
Typical questions asked about products:
- Is the product durable?
- Is the product easy to use?
- What are the dimensions of the product?
Customer Reviews
Jul 3, 2021
Mislabeled box. 7" duct instead of 6"
I'm not sure what the deal was (if someone switched the label or manufacturing error) but the box I bought had a 6in label on it and the ducting ended up being 7in. Unfortunately, I did figure this out until I dragged the box up into the attic and opened it up. At that point it just wasn't worth it to drag it back out and try to cram it all back in the back (it basically springs out once opened). I made it work, but it was still frustrating and made the project just that much harder. So try and double check the sizing of the ducting before you get too deep.
by
May 29, 2018
Decent quality. Wish they had higher R ratings available.
Decent quality. Wish they had higher R ratings available.
by
Apr 24, 2018
Easy to install with a screwdriver, knife, and wire cutter (needle nose pliers for the wire in th...
Easy to install with a screwdriver, knife, and wire cutter (needle nose pliers for the wire in the outer shell). It insulates the inner tube from the cold attic in the winter.
by
Jun 14, 2011
Product is durable and easy to work with.
I ordered two. Product is durable and easy to work with.
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Jun 14, 2011
Product is durable and easy to work with.
I ordered two. Product is durable and easy to work with. After shaking and pulling, both were 22 ft long not 25 ft. I really missed the extra 6 feet but made it work. I got 2 10" also both were 25ft. Tip:I recycled all the insulation from the old flex duct .
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Jun 3, 2022
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Jun 1, 2022
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May 26, 2022
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May 20, 2022
Good insulation easy to work with....
Good insulation easy to work with.
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Response from Master FlowMay 25, 2022
Thank you for the feedback. Glad you were satisfied with your Master Flow purchase.
May 19, 2022
by
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