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Internet # 100139225

Model # SP57/11C

Store SKU # 417920

Store SO SKU #923710

Fiberglass Water Heater Insulation Blanket

$26.36
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  • For use with both gas and electric water heaters
  • Reduces water heater recovery time to save energy
  • Durable fiberglass body with R-10 insul.,Fits up to 60-gal tank
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Product Details

About This Product

The Thermwell Products Co. Inc. Fiberglass Water Heater Insulation Blanket fits up to a 60 Gal. tank. It is compatible with both gas and electric water heaters. This blanket helps you save energy by reducing your water heater's recovery time.

Highlights

  • For use with both gas and electric water heaters
  • Fits up to a 60 Gal. tank
  • Insulates a water heater
  • Reduces water heater recovery time to save energy
  • Durable fiberglass body with R-10 insulation
  • East Installation
  • saves money
  • saves energy
  • package includes a roll of plastic tape
  • 3 in. thick
  • Click here to learn more about Eco Options and Energy Efficiency
  • Return Policy

Product Information

Internet # 100139225

Model # SP57/11C

Store SKU # 417920

Store SO SKU #923710

Specifications

Dimensions: H 48 in, W 75 in, D 3 in

Dimensions

Product Depth (in.)

3 in

Product Height (in.)

48 in

Product Width (in.)

75 in

Details

Application

Water Heater

Compatible Brand/Model

No

Finish Family

White

For Use With

Electric Tank, Gas Tank

Material

Fiberglass/Vinyl

Pack Size

1

Product Type

Blanket/Jacket

Product Weight (lb.)

4.95 lb

Returnable

90-Day

Warranty / Certifications

Manufacturer Warranty

180 days

Questions & Answers

My water heater (electric) measures 64" in circumference and 64" tall.
ByFeb 16, 2025
1 Answer | 
Answer This Question

The blanket is 72” x 48”.

By|Feb 17, 2025
    0/0


    Is it beneficial to wrap my hot water tank? Mine is in a basement with no heat
    ByFeb 13, 2025
    2 Answers | 
    Answer This Question

    Yes, it will help save energy. Mike

    By|Feb 23, 2025
    0/0

    (1)

    Extra insulation for water heaters in unheated areas always helps with the efficiently of the water heater. Insulating the pipes coming out of the water heater also will help. Make sure you only use fiberglass pipe insulation on the outgoing hot water line.

    By|Feb 23, 2025
      0/0

      (1)

      Could I use this to insulate HVAC return duct that is 18" diameter in crawl space? The knock on the duct wrap seems to be the insulation separating from the foil while installing.
      ByJan 30, 2025
      1 Answer | 
      Answer This Question

      Yes you can use it to wrap your ir return.

      By|Feb 23, 2025
        0/0

        (1)

        What is the R value
        ByNov 24, 2024
        2 Answers | 
        Answer This Question

        I see that it lists it as R-10

        By|Jan 17, 2025
          0/0

          (2)

          This wter heater blanket is rated as an R-10 Blanket.

          By|Jan 17, 2025
            0/0

            (1)

            Does the blanket include tape?
            ByOct 29, 2024
            1 Answer | 
            Answer This Question

            The Water Heater Blanket does come with enough tape to install.

            By|Feb 23, 2025
              0/0

              (3)

              Will this fit a fat boy hot water heater
              ByMay 20, 2024
              1 Answer | 
              Answer This Question

              We cannot tell you, not knowing the capacity (gallon size) of your water heater. The blanket is 72" wide, so if the circumference of your water heater is that size or smaller, it will fit.

              By|May 22, 2024
                0/0


                my tank is 60" high and id a 65 gal tank, will this blanket fit it"?????
                ByFeb 22, 2024
                2 Answers | 
                Answer This Question

                The other answer is wrong. They meant 75 in circumference, not diameter But it will only cover 48 inches of your height. So it’s not a great fit, the bottom 12” will have no blanket. but I suppose some blanket is better than none.

                By|Mar 17, 2025
                  0/0

                  (2)

                  As long as it is not over 72" in diameter it will fit.

                  By|Apr 19, 2024
                    0/0

                    (1)

                    What size do I get for a 50 gallon furnace ?
                    ByJan 23, 2024
                    2 Answers | 
                    Answer This Question

                    No! So frustrating. Most 50 gal are 58 7/8 by 20” diameter so you’d need a 59 by 63” blanket they only sell a 75 by 48????

                    By|Dec 7, 2024
                      0/0

                      This blanket is 48” X 72” and should fit your water heater.

                      By|Feb 23, 2025
                        0/0

                        (2)

                        Viewing 1-8 of 59

                        Customer Reviews

                        3.8 out of 5

                        • 3.8 out of 556 reviews
                        • 66% recommend this product
                        What Customers Say
                        Summarized by generative AI from text of customer reviews

                        Customers say the insulation blanket is easy to install and generally effective in maintaining water temperature, leading to potential savings on energy bills. However, many users noted that the blanket's size does not always match the advertised specifications, leading to issues with fit, particularly for larger water heaters. Additionally, the fiberglass material can create a mess during installation, and the included tape is often deemed inadequate, prompting some customers to use alternative solutions. Overall, while the product serves its purpose, improvements in sizing and tape quality could enhance the user experience.

                        Filter by:
                        Showing 1-10 of 556 reviews
                        Good quality . But, Not enough insulation to completely cover a 50 gal water heater.
                        by
                        • Verified Purchase
                        1 found this review helpful
                        Just large enough for a 45 Gal. ITCHY.
                        Was *just* large enough to fit my 45 gal Indirect water heater (SSU-45N). *TONS* of fiberglass in the air when manipulating it, WEAR FULL CLOTHING AND MASK + EYE PRO. It did come with some tape. I installed it by myself, so I used some painters tape over the top of it attached to the heater to keep it in place while I worked my way around it and did the necessary cuts. Didn't come out perfect but it'll work.
                        by
                          • Recommended
                          7 found this review helpful
                          NOT long enough!
                          Very easy to install but blanket wasn't long enough to reach around my tank! I have a new 50 gallon Rheem-PROE50M2RH95 electric water heater, measures 70" around. Instructions state the blanket is 75" long, was about 5" short of the ends coming together. I didn't have to trim any off or leave openings for access panels. I'm guessing the 3" thick insulation takes up the needed length. Future productions need to be 80" long! I have 98% of tank covered, guess that's better than nothing.
                          by
                            • Recommended
                            5 found this review helpful
                            Too small for hot water heater
                            Product is good but you will need two of them to fit your hot water heater
                            by
                            • Verified Purchase
                            3 found this review helpful
                            Serious Energy Savings
                            Made a great water heater jacket! Was simple to work with. After applying some reflective foil-clad bubble insulation, I fashioned battens (of the same stuff) to create an air gap. The Frost King insulation, then, was applied as the 'outer jacket.' It was light enough to be easily supported, while comprising the air-sealing layer of that composite cross-section. Thus I benefit from the combined R-values of the (1) bubble foil, (2) air gap (substantial!), and (3) the Frost King, itself. I immediately saw a reduction in energy consumption. Even though my water heater tank is a well-insulated (from the factory) heat pump-driven model. Do spend money on good wide tape compatible with the mylar facing. Apply it neatly and thoroughly without creases. I was able the use semi-rigid foam and outline "service ports" in the insulation jacket where it was pre-cut for foreseeable maintenance access; allowing it to be re-sealed and re-used in the future.
                            by
                              • Recommended
                              11 found this review helpful
                              Easy to install. Tape was of good quality and adhering to the heaters surface. Minimal cutting. O...
                              Easy to install. Tape was of good quality and adhering to the heaters surface. Minimal cutting. Overall The water temperature did get hotter, proving its working.
                              by
                              • Verified Purchase
                              • Recommended
                              1 found this review helpful
                              This is R10. I did have to tape it to the top of the electric water heater cause it kept slipping...
                              This is R10. I did have to tape it to the top of the electric water heater cause it kept slipping off. I did it alone but would be easier if two people did it. Used the scrap peices for the top of it.
                              by
                                • Recommended
                                2 found this review helpful
                                Came with everything needed to install on to the heater. Instructions followed simple and easy. A...
                                Came with everything needed to install on to the heater. Instructions followed simple and easy. As instructions state protect yourself with clothing, gloves, and glasses to protect from fiberglass. Even a light mask for the mouth will help. I added a little tape around the openings to protect, trim and help hold it in place. Fifteen / Twenty minute install time.
                                by
                                • Verified Purchase
                                • Recommended
                                1 found this review helpful
                                Installed this on a 40 gallon electric water heater in about 20 minutes. Fit very well. Covered...
                                Installed this on a 40 gallon electric water heater in about 20 minutes. Fit very well. Covered entire vertical surface and only overlapped a few inches so I did not trim it at all. Only had to cut a slit at bottom for drain valve. Did not cut out for thermostats. I will do that only when I need to. I can feel the thermostat covers thru the insulation so it should be easy to do if required. Since I did not trim I had nothing for the top. I will do that with rigid foam I have left over from a different project. They claim the insulation is 3" but not after being folded, rolled and vacuum packed. I doubt you get the claimed R10 insulation value but it's better than most others I looked at in competitor's stores around here in South Texas.
                                by
                                  • Recommended
                                  3 found this review helpful
                                  Too small for a 50 Gallon water heater with a circumference of 65 inches. You would think this b...
                                  Too small for a 50 Gallon water heater with a circumference of 65 inches. You would think this blanket with a length of 75 inches would do it, but no. It's about 10 inches too short. For a 50 gallon water heater with a circumference of 65 inches you need a blanket that is at least 85 inches long.
                                  by
                                    15 found this review helpful
                                    Showing 1-10 of 556 reviews