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Sturdy Covers AC Defender - Window Air Conditioner Unit Cover - AC Cover

  • Based on 2,235 reviews
Condition: New
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$22.99 Why this price?
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Availability: In Stock.
Fulfilled by Amazon

Arrives Wednesday, Jul 3
Order within 6 hours and 27 minutes
Available payment plans shown during checkout

Color: Black


Size: Medium


Features

  • PREVENTS DRAFTS: AC cover securely fits the back of window-mounted AC units, helping conserve energy in the winter months by blocking cold drafts from entering the home
  • DURABLE DESIGN: Made of heavy-duty, waterproof 600D polyester, these AC covers are built to withstand snow and rain, helping prolong the lifespan of window units
  • FULL COVERAGE: Measuring 17L x 25W x 21H inches, this AC unit cover is designed to fit over the top, bottom, and sides of standard window units, preventing the accumulation of moisture and debris from outside
  • ADJUSTABLE STRAPS INCLUDED: 2 plastic buckle straps included with this AC winter cover to firmly install the cover and help protect the unit during windy conditions
  • GUARANTEED QUALITY: AC Defender air conditioning covers for window units are backed by a 3-year manufacturers warranty and a 100% satisfaction guarantee

Material: Polyester


Color: Black


Brand: STURDY COVERS EST. 2015


Item Weight: 1.41 Pounds


Water Resistance Level: Waterproof


Product Dimensions: 21 x 25 x 17 inches


Item Weight: 1.41 pounds


Manufacturer: Sturdy Covers


Item model number: WCTB17H


Is Discontinued By Manufacturer: No


Batteries required: No


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Jul 3

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • Does the job!
Color: Black Size: Small
UPDATE: . Getting ready to install this cover for the third winter season, October thru May. It still works great, keeping the weather out, though the sun has faded the outer material noticeably to a light gray after 2 seasons. Just bought another for a second 8000 BTU window AC unit, which I don't want to have to remove anymore. They seem to get heavier year on year! ;-) The SMALL size (the dimensions of which are typical for all small covers) won't fit quite as snug since that unit is only 18.5 inch W x 12 inch H. The straps will take up the slack, which I'll force to the underside. . ORIGINAL REVIEW: . Just received and fitted the "Small" window AC cover. It is a heavy-duty fabric material, with a smooth waterproof inner lining. The seams are reinforced with an additional fabric strip. While slightly larger and longer than the AC unit, it is an easy install and close to a perfect fit for my unit, covering all five sides. The additional length ensures that the cover "seals" well against the window. The two simple straps with plastic snap-fit buckles fasten the cover tightly onto the AC unit, primarily clamping it at the corners. After the install, I did tuck the lower seams under (third photo) so as to eliminate the "trough" (second photo) that could collect debris, water and snow. I also was able to ensure the bottom tray of the AC unit was dry as it's been off for a few days and the weather has been dry. This AC unit is the type that purposely collects water in the bottom to make it more efficient and there's no drain plug. Any water left in the bottom would be a great source of mold and potential ice in the winter! I can see that this will protect and eliminate drafts through the AC unit, but it's not going to insulate it from the cold as it's not that type of material. The black color will absorb some heat on sunny days though, which will help to warm the cold air inside the unit. Some cold air will convect into the room through the vents as we don't currently plan to fit a cover on the inside. This is the first time we've left the 12,000 BTU window AC in place over the winter (it's getting too much to lift it out every year, clean it and carry it up to the attic - a 2 person job). So, these next few months will tell how well this product works. I will be updating the review in the future. At $21, very pleased with the value so far. ... show more
Reviewed in the United States on September 22, 2020 by Allen D. Reinecke Allen D. Reinecke

  • Great product
Color: Black Size: Large
Fast shipping and this is great to cover the AC in winter time. Fits perfect and has straps to tighten. I also use other bungee cords to make it tighter. Protects in all weather for rain and snow. Material hasn't torn or anything.
Reviewed in the United States on September 15, 2023 by Amazon Customer

  • A nice cover for a good price
Color: Black Size: Large
I purchased this after getting tired of fitting a 10' x 12' tarp over our through-the-wall AC unit for the past several years. This was so easy to install and fit perfectly around our AC unit. I wished that I purchased something like this years ago! The cover feels well made and when I inspected it before putting it on the AC unit it appeared to be in good shape with no visible light through the panels or at the seams. The cover slipped effortlessly over the exterior of the unit but was a few inches too long. Following the supplied directions, I rolled the excess material under the cover and snugged it up against the exterior wall. Previously I held the tarp on with a few bungee cords and I have to say that the straps supplied with the cover went on easy and cinched down nice and tight around the cover. I tied up the tails and feel confident that the cover will hold tight through the nastiest of winter storms. The snug fit and tight straps should keep the material from flapping in the wind and wearing out. I gave it four stars because it has only seen one rain storm and some fall winds and I haven't seen if it will last through the winter and spring. If it doesn't, I will be back to let everyone know. ... show more
Reviewed in the United States on November 10, 2020 by Ex-ChiefJim

  • Good quality!
Color: Black Size: Large
Update 2023: This cover has survived through 2 PA winters and is ready for it's 3rd. It is just as sturdy and thick today as the day I bought it. It has faded to a grey color, due to sun exposure, but that doesn't matter to me. I'm sure this cover will last a very long time with proper storage. Thick, insulated, sturdy. The straps are adjustable so you can snug it tight against your AC unit. My AC unit was between sizes so I purchased the larger size and folded it down to fit, which doesn't appear to have any negative effects. It's been on my wall unit for about a month and has sustained rain and wind so far. This cover is far superior to the cheap metallic/shiny covers you find at Wal-Mart or Lowes. I have yet to hear any air hissing through and into my house, which is a substantial improvement over lesser quality covers. We'll see how it holds up once winter formally arrives and we're at temps around zero degrees with snow/ice. So far, I feel confident this will sustain just fine. ... show more
Reviewed in the United States on November 27, 2021 by Amazon Customer

  • Sturdy Cover? Yeah.
Color: Black Size: Medium
Sturdy Straps? No. To be fair, my vice-grip hands are like a gorilla's, so chances are most people aren't going to snap the thing clean off trying to tighten it up on the very first use like I did. I ended up using the remaining not-broken strap, tying the broken strap, and then adding a good length bungee cord for good measure and it all worked out fine. No problems all winter long and we had a LOT of snow. Like, more snow than we've had in many, many years. Not a problem for this thing. A/C unit looked just as clean as I'd left it in the fall, this thing kept cold air out of the bedroom without the need of installing any extra insulation, and the unit fired up with zero problems after removing the bag. Shame about the strap, but I'm still going to use this thing next winter just like I did the year before. I might buy another bungee cord or two and just ditch the straps altogether. The bag itself works great and is the important part. Totally worth the purchase. ... show more
Reviewed in the United States on June 2, 2021 by MG

  • Made it through 2 winters!
Color: Black Size: Large
Very pleased with these covers. We struggled to find one that would work on A/C units in the wall that had bottom brackets to the house siding, which required the bottom to be open. While these didn't have that, we were able to adapt these to fit snugly. The straps work great as well. I wanted to make sure they made it through a winter or two before posting a review and they met the requirements! ... show more
Reviewed in the United States on March 19, 2023 by Mcap

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