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Deal.ai › Frost King › Air Conditioners
Frost King
Frost King air conditioner side panel

Frost King air conditioner side panel

4.3(122 ratings)

Best price now

$12.98at WalmartChecked 1 h ago

35% under what the other stores charge

Compared across 3 stores. Prices are checked against each store and labelled with when.

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Price facts

  • Lowest price today: $12.98 at Walmart (checked Nov 10, 2026).
  • Checked at 3 stores.

Our take on the Frost King air conditioner side panel

The Frost King AC14H is a foam weather seal for window air conditioners, sized 18 by 9 inches and 7/8 inch thick. The open-cell polyurethane foam compresses into the gaps on either side of a window unit to block hot air, insects and dust, and it also seals window drafts in winter. It is a low-cost accessory rather than a cooling product, so it suits anyone installing a window AC with leftover side gaps. Compared with rigid plastic side panels or accordion fillers, foam is easier to trim and conforms to uneven frames, but it is softer and less durable over several seasons.

Best forWindow AC installs with wide side gapsRenters who want a no-tools sealSealing window drafts in winterFilling uneven or irregular window frames
Pros
  • Compresses into gaps of varying width
  • Cuts easily with a knife to fit
  • Blocks hot air, dust and insects
  • Works for winter draft sealing too
  • No tools or hardware needed
Cons
  • Foam tears if pulled or over-compressed
  • May need replacing after a season or two
  • One piece per pack, so measure both sides
  • Gray color shows dirt

Frost King air conditioner side panel prices at every store

  • WalmartNew

    In stockSold by DbkaySales LLCReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.

    $12.98+ $5.99 shippingChecked 1 h ago
    Visit Walmart
  • The Home DepotNew

    In stock

    $19.87Checked 1 h ago
    Visit The Home Depot
  • Lowe'sNew

    In stock

    $19.99Checked 1 h ago
    Visit Lowe's

Also available at

  • WalmartCheck price at Walmart

Store links may earn us a commission. Some prices via Klarna.

Frost King air conditioner side panel price history

Lowest price we've seen: $15.90 on Nov 10 at Walmart. Tracked across 3 stores since Nov 10.

What reviewers say

  • 4.3 / 5122 ratings

Buyers rate it well for sealing window AC side gaps and cutting down drafts. Most complaints center on the foam being thin or flimsy and needing replacement sooner than expected.

What people mention
  • FitPraisedBuyers say it trims easily and fills the side gaps on most window units.
  • Draft blockingPraisedOwners report less hot air and fewer insects coming in around the AC.
  • DurabilityCriticisedSeveral say the foam tears or flattens and needs replacing within a season or two.
  • BuildMixedSome find the foam thinner and softer than expected for the thickness listed.
  • InstallationPraisedReviewers call it quick to press into place with no tools or hardware.

About the Frost King air conditioner side panel

The Frost King Air Conditioner Weather Seal helps the air conditioner in your window to cool the room more efficiently in the summer. In addition to that, it helps to prevent heat loss in your house during the winter. This Frost King air conditioner side panel is made of highly compressible open cell polyurethane foam. It's super easy to compress the strip in between holes or cracks around your air conditioner or window. Once you do, you will be protected from heated air, insects, dust and other unwanted pollution. Frost King AC14H Side Panel Air Conditioner Weather Seal, 18"L x 9"W x 7/8" T, Gray

Specifications

Functions
Cooling FunctionalitySource
size
1Source
color
MulticolorSource

Questions and answers

What is the Frost King AC14H side panel made of?
It is open-cell polyurethane foam, 7/8 inch thick, sized 18 by 9 inches. It compresses into gaps around a window air conditioner.
Will it fit my window AC?
It fits most standard window units, but measure the side gaps first. The foam can be cut down if it is too large.
Can I use it in winter?
Yes. Frost King markets it for sealing window drafts when the AC is removed or covered.
How many pieces come in a pack?
One foam panel. If both sides of your unit have gaps, you may need two.
How long does it last?
Expect one to two seasons. The foam compresses and can tear, so inspect it each year.
Does it replace the plastic side panels?
No. It supplements or substitutes for the accordion fillers; it does not support the unit.
Where is the Frost King air conditioner side panel cheapest?
At Walmart, for $12.98, 35% under what the other stores charge, as of our latest check.
What do buyers say about the Frost King air conditioner side panel?
Rated 4.3 out of 5 from 122 ratings.
Where can I buy the Frost King air conditioner side panel?
3 stores we checked sell it, including The Home Depot, Lowe's, Walmart.

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Buying guides that pick the Frost King air conditioner side panel

  • Best insulated side panels for window air conditioners

Stores we've priced the Frost King air conditioner side panel at

  • Home Depot deals and prices
  • Lowe's deals and prices
  • Walmart deals and prices

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