#1 Home Improvement Retailer

Internet # 202562739

Model # F8IFD4X300

Store SKU # 809916

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

$72.78
Apply Now
Pay $47.78 after $25 OFF your total qualifying purchase upon opening a new card. info
Apply for a Home Depot Consumer Card
  • 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
Store
0 in stock
icon
Free & Easy Returns In Store or Online
Return this item within 90 days of purchase. Read Return Policy
caret

Product Details

The Master Flow 4 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 degree F
  • Always install per instructions and seal using approved mastic or sealant (or approved tape)
  • Return Policy

Additional Resources

From the Manufacturer

caret

Specifications

Dimensions: H 8.5 in, W 8.5 in, D 300 in

Dimensions

Product Depth (in.)300 inProduct Diameter (in.)4
Product Height (in.)8.5 inProduct Length (in.)300 in
Product Width (in.)8.5 inWall Thickness (in.)2.25

Details

ColorSilver JacketInsulatedYes
Insulation R-Value8Insulator materialOther
MaterialFiberglassMaximum air flow (CFM)30.0
Pack Size1Returnable90-Day

Warranty / Certifications

Certifications and ListingsETL Listed, UL Recognized
caret

Questions & Answers

81Questions
caret
Q:Can I install it over a 4 bathroom fan outlet or do I need a 4-to-6 inch increaser adapter?
by|Nov 19, 2023
1 Answer
Answer This Question

A:  You will need an increaser for proper installation, or you could use the 4" flexible duct. If you have any inquiries about Master Flow products please email MasterFlowTech@gaf.com

by|Nov 28, 2023
    caret
    Q:Is this duct directional when installing for a bathroom exhaust? Not sure why the airflow is restricted . Is it sufficient for 80 to 110 cfm run with in 15feet?
    by|Oct 30, 2023
    1 Answer
    Answer This Question

    A:  Air will flow in either direction, 4" flexible duct is rated at 30 CFMs. The manufacturer's installation instructions for the fan should have required or recommended sizing chart

    by|Nov 6, 2023
      caret
      Q:Can this be used for the return inlet under a mobile home or would the black type ductwork be better?
      by|Sep 13, 2023
      1 Answer
      Answer This Question

      A:  Both types of flexible can be used, although you should check your local codes for more specific requirements. If you have any inquiries about Master Flow products please email MasterFlowTech@gaf.com

      by|Oct 2, 2023
        caret
        Q:Im Living in a trailer and I want to Know if I can use this flexible duct R8 for my heater/air conditioning that works with electricity and gas ?
        by|Aug 7, 2023
        1 Answer
        Answer This Question

        A:  Yes, it can be used in your situation, check your local codes for specifics on clearances from the ground and the equipment. If you have any inquiries about Master Flow products please email warrantyllbp@gaf.com

        by|Nov 5, 2023
          Showing 1-4 of 81
          caret

          Customer Reviews

          4.7 out of 5
          (344)
          • 4.7
            out of 344 reviews
          • 92% recommend this product
          Filter by:
          Showing 1-10 of 344 reviews
          Definitely a quality product, very easy to work with. Ships in a box that may arrive open, but that did not affect the quality of the product. Will absolutely use again.
          by
          Response from Master FlowAug 18, 2023
          Thank you for the feedback. Glad you were satisfied with your Master Flow purchase. MasterFlow
          • Verified Purchase
          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
            Decent quality. Wish they had higher R ratings available.
            Decent quality. Wish they had higher R ratings available.
            by
            • Verified Purchase
            • Recommended
            3 found this review helpful
            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
            • Verified Purchase
            • Recommended
            1 found this review helpful
            Product is durable and easy to work with.
            I ordered two. Product is durable and easy to work with.
            by
            • Verified Purchase
            • Recommended
            4 found this review helpful
            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 .
            by
            • Verified Purchase
            • Recommended
            18 found this review helpful
            Enclosed an 8” duct. Worked well. Easy to do. Should help keep heat in duct.
            by
            Response from Master FlowNov 30, 2023
            Thank you for the feedback. Glad you were satisfied with your Master Flow purchase. MasterFlow
              by
                by
                  If you want to move a large volume of air this is the way to go. The foil wrap is super tough and even looks good suspended in our open ceiling.
                  by
                  Response from Master FlowOct 19, 2023
                  Glad you were satisfied with your Master Flow purchase. Thanks for the feedback. MasterFlow
                    Showing 1-10 of 344 reviews