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Thermwell Products SP57-11C Water Heater Insulation Blanket

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List Price: $25.99
Price: $21.57 & FREE Shipping on orders over $35. Details
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1
  • 3.5-inch-by-48-Inches-by 75-inches
  • Reflective value is 10
  • Double sided foil and fiberglass
21 new from $16.95

Frequently Bought Together

Thermwell SP57/11C Water Heater Blankets + Scotch Aluminum Foil Tape 3311 Silver, 2 in x 10 yd 3.6 mil (Pack of 1)
Price for both: $25.49

Buy the selected items together

Product Details

Package Quantity: 1
  • Product Dimensions: 10 x 10 x 25 inches ; 5.4 pounds
  • Shipping Weight: 5.8 pounds (View shipping rates and policies)
  • Shipping: This item is also available for shipping to select countries outside the U.S.
  • Shipping Advisory: This item must be shipped separately from other items in your order. Additional shipping charges will not apply.
  • ASIN: B000BPCWQY
  • Item model number: SP57/11C
  • Average Customer Review: 3.2 out of 5 stars  See all reviews (41 customer reviews)
  • Amazon Best Sellers Rank: #38,789 in Home Improvement (See Top 100 in Home Improvement)

Product Description

Package Quantity: 1

From the Manufacturer

The Frost King SP57/11C Water heater Insultion Blanket is fibergalss and foil on both sides for supreme insulation and fits most gas, oil or electric water heaters. Includes foiltape for easy installation. The reflective value is rated at 10.

Product Description

Thermwell SP57/11C Water Heater Blanket. Fits up to 60-gallon water heater. 3-Inch tall by 48-inch wide by 75-inch tall


Customer Questions & Answers

Customer Reviews

The tape is like paper with some stickey stuff.
Eric
It says it fits a 60 gallon tank, but it doesn't even fit my 52 gallon tank, barely stretching to 2/3 around.
Shannon Comstock
This blanket barely wraps around an electric 40 gallon water heater.
Aaron

Most Helpful Customer Reviews

48 of 50 people found the following review helpful By Joe Airaudi on January 19, 2009
Item Package Quantity: 1 Verified Purchase
I got this product through Amazon because my local Home Depots don't sell them here in Austin. The product is just as described, it's basically fiberglass insulation with vinyl on either side. It is NOT sealed together, the way a down blanket is, it's more of a loose sandwich. It's easy to cut with sharp scissors, and you'll need to cut no matter what size water heater you have. Couple of things to note:
- I chose this model because it had the highest R-value (R10) in the description of any blanket/jacket I'd seen. The R-value was mysteriously missing from the product packaging, so now I doubt it was that high. You'd think they would capitalize on being 30% more efficient than the next model..
- I thought, since there is no warning to the contrary, that this was the kind of fiberglass you can handle with your bare hands without getting itchy. It's not, so wear gloves
For the money, I say get one, it can't hurt. Even though my water heater was cool to the touch while on, I can tell it's getting toasty under the blanket.
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21 of 24 people found the following review helpful By John Ehr on February 8, 2008
Item Package Quantity: 1
Works great on a 50 gallon tank...installed in last then 15 minutes! Not problem and easy to install. I did 2 of them in about 20 minutes. All you need is a pair of scissors.
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9 of 9 people found the following review helpful By George Burkhard on December 15, 2011
Item Package Quantity: 1 Verified Purchase
I figured that an item that fits "up to 60gal tank" would fit my meager 40gal. In the end, I did manage to get it to fit, but I had to cut it into multiple pieces. The 75" length was taller than my tank, but the 48" width was not enough to get around the circumference (and no, it would not even remotely fit if rotated 90 degrees). I cut off the excess from the height and taped it to the remainder to enhance the width, and with some stretching, managed to get it around my tank. The small amount of tape provided was enough to hold it all together, but not enough to completely cover the seams as indicated in the installation instructions. Also, the R-value probably suffered a bit from compressing the insulation so that it could fit the tank. They could've won a 5-star vote if they'd included a more reasonable size blanket and a sufficient amount of tape.
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7 of 8 people found the following review helpful By Ferg's Mom on January 31, 2010
Item Package Quantity: 1 Verified Purchase
We noticed an immediate difference in the efficiency of our hot water delivery. One water heater is in the garage and the other in the attic, but both deliver a much better, more consistently heated water supply. This is the most cost effective energy saving project we have ever completed.
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6 of 7 people found the following review helpful By Jan on January 9, 2011
Item Package Quantity: 1
CONS
- as other reviews this is too small for our boiler, but since our boiler is in the corner right at the two walls, I would not able to wrap it around the whole boiler anyways
- be ready for TONS and TONS of fiberglass dust after you are done everywhere in your garage - close car windows, doors to your house... (make sure to wear special clothes, respiratory mask, hat, glasses and gloves) - not exaggerating - you can argue that we are married with fiberglass these days - true - but even after adding blow-in (AttiCat) insulation to the attic it was not so messy job...
- more tape should be provided, used FlexFix from Nashua to fill the missing feets/meeters of tape needed

PROS
- after applying the insulated part is about 8F (4C) colder than the uninsulated part - so it really works (reason for 3 stars)

OTHER THOUGHTS
- let you wife know what you are up to so she does not feel surprised seing you hugging the boiler in the garage :) :) :)

Have fun!
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47 of 67 people found the following review helpful By Ashish Shah on January 29, 2009
Item Package Quantity: 1 Verified Purchase
I purchased this product based on other reviews. Well, this 75" blanket doesn't fit on my 50 gallon heater. I thought I was smart to measure the tank's circumference before ordering it, but I forgot one thing.

The circumference of the tank is 75", and so I thought it would be a perfect fit. Well, it turns-out that the blanket is 3.5" thick and so I forgot to compensate that the blanket's thickness will reduce the overall length as I wrap it around the heater. So now it's 1 foot short and I can't close both of the ends.

Besides looking ugly, it wouldn't be effective in its job to save energy. Now I will have to go look for an insulation piece 1 foot x 4 feet long from Home Depot to cover the silly opening.

It's funny that they're advertising this product for 60 gallons when it doesn't wrap my 50-gallon tank that has 75" circumference. I suggest you measure your tank first and then add at least 12" on top of it to get a total blanket length you need. Good luck!
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2 of 2 people found the following review helpful By cdk on January 11, 2014
Item Package Quantity: 1
I purchased this at Home Depot because I didn't want to wait for it to ship. But with free shipping it would have been the exact same price. Okay, so let me address some "problems" people have raised in their reviews.

1) It does fit just fine. I have a 40 gallon gas hot water heater. Gas hot water heaters have no water in the bottom foot or so of the tank. That's where the burner is. Not only should you not insulate that portion because it won't gain you anything (only insulate where the water is) but you also risk blocking the air intake (very bad idea). A good rule of thumb to find where the bottom of the water is, look for the drain valve. It's installed at the bottom of the water tank. So I installed it with the 48" as the height and the 75" to wrap around. I was left with a good 5-6 inches overlap, so clearly room for a larger tank. Also, you don't want to insulate the top of a gas tank as you risk obstructing air flow into the flue.

2) There is almost enough tape (-half star). I used one long piece to secure the vertical seam (48") and small pieces to secure it at the top. This used all the tape. I'd prefer a few more feet so I could secure it at the bottom (simply to seal in the fiber glass).

3) It's fiberglass, so long pants, long sleeves, gloves, and respirator are a must. When you finish, make sure to shake out your hair, throw clothes in laundry, and take a shower. Don't go walking around your house. I didn't notice a strong smell from it like other fiberglass products.

4) It would be improved by flaps (-half star). Besides one edge, the plastic facing is exactly the same size as the underlying insulation.
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