Frost King Air Conditioner Filters, 15 in. x24 in. x3/16 in. , Open Cell Foam

This foam filter works surprisingly well for how inexpensive it is. It’s very lightweight and easy to cut into custom shapes or sizes, which makes it useful for way more than just air conditioners. I’ve seen people use it for AC units, space heaters, gaming PCs, air purifiers, and other devices that need simple airflow filtration. One of the best things about it is that it doesn’t noticeably restrict airflow. Since the foam is thin and porous, air still moves through easily while helping catch larger dust, lint, hair, and debris before they get pulled into equipment. That balance between filtration and airflow works really well for applications where thicker filters would choke performance. Installation is extremely simple. You can cut it with regular scissors using an old filter as a template, and the material trims cleanly without crumbling apart. The sizing is generous too, so one sheet can often make multiple replacement filters depending on what you’re using it for. The foam material feels durable enough to wash and reuse several times before needing replacement. It’s flexible, lightweight, and holds up surprisingly well after cleaning. The open-cell foam design also makes it easy to rinse out trapped dust and lint. Fit obviously depends on what you’re cutting it for, but because it’s so customizable, it works well in odd-shaped or hard-to-find filter sizes where official replacements are expensive or unavailable. The only small downside is that it can retain fold lines from packaging initially, but those flatten out over time or once installed. Also, because it’s a thinner foam filter, it’s more for larger particles and airflow protection rather than super fine HEPA-style filtration. Overall though, this is an excellent value filter material that’s versatile, easy to work with, maintains strong airflow, and works great for custom filter replacements and DIY projects.

My BedJet II uses a small rectangle shaped foam filter (5" x 10" x 3/16") that catches dust, lint, etc. at the air inlet end of the machine (think inflow on a vacuum). The filter that comes on the BedJet is a simple thin piece of foam that's hand washable or can be gently cleaned with a vacuum. It's a really cheap filter, it's just a piece of foam that doesn't have a frame or anything like that. (Since this functioned as a light duty filter, a foam filter with rigid frame would have been overkill. I first searched the BedJet company website, didn't see anywhere on the site that the Company sold the filters. (Probably no money in selling 10 cent pieces of foam.) So since it was a pathetically simple filter I decided to fabricate my own. Ordered this foam sheet based on it being 3/16" thick; the BedJet one measured about the same thickness. Warning: Compared to the foam filter on the BedJet, this foam is NOT as dense. Will that matter, i.e., is this foam less protective? I dunno. I'm going to keep an eye on how much dirt, lint, or other debris (e.g., the lint from flannel bed sheets) this filter catches compared to the "heartier" BedJet stock filter. If it's not working as well, I will need to search for another foam/filter solution. The foam arrived, I quickly used the existing filter as a template to form the filter. Tools were a pair of full sized scissors for the long cuts, and manicurist scissors for the small cuts. A few snip snip snips, I was all done. At the moment of truth if fit perfect and the machine works great. With one sheet I can make four filters. Can't beat that price point, $1.50 each total cost. (My labor is free.) So subject to the density issue, if you need to make a homemade filter, if this is the thickness and dimensions you need I highly recommend the product. Between me and my family we have four BedJets. So I'll be ordering more sheets so I don't have to think about making filters for a long time. And at this price point I will buy some extra sheets because one can never have enough filter foam for cutting to shape and size and placing it on or in any device that sucks in air.

Perfect replacement. Very easy installation. Each envelope contained 1 sheet of thin foam, which was more than enough material to replace filters in 2 of my through-the-wall air conditioners. This foam filter is thin; you can actually see through it. For cutting the correct sizes, I used the original filters as templates. With these new filters in place, my air conditioners are now working fine, blowing and cooling Dust Free. The new filters did not impede air flow.

I like these. I know, they’re old school. I use them as a kind of prefilter over the plastic mesh filter in my combo ac/heat unit. They are quite thin, easily installed, no bulk to impact airflow or closing the cover. They cut like a dream for custom fit. As to air quality, well they’re thin and porous so they’re not going to get small dust particles, but getting larger ones, cat hairs, etc., I think they’re worth helping even a little with air quality.

Work great! Easy to cut to size with scissors.

I needed a lightweight and thin filter for my space heater. The original filter was too old and dirty. It was very easy to cut this filter to size to fit it into the back of the space heater to replace the old one. It is thin enough so that airflow doesn't get impeded while still able to trap small debris and dust.

I bought this to make intake filters for my gaming pc. It worked so well that i also cut one to size and added it to my air purifier for an extra layer and it catches more dust than all of the other 3 filters.

Good as advertised, but it kept the memory of the package folding.

lo utilice para añadirlo al splitter del aire acondicionado de la pared el tipico y sobro algo, no para repetir el corte..

Due to winter I haven't use it in my Ac ,will give detailed feedback after using it

Got this for replacing the foam on the air intake of a vintage P.A. power amp. Indeed since i couldn't find the exact foam density anywhere else i decided to try this out and i'm happy to report it is amazingly perfect for this audio application. When you think about it either you use this foam for air conditioning purposes or air intake on audio equipment the foam does essentially the same job of filtering dust while allowing enough air to enter the system to cool it off. Just writing this review in case somebody else is looking for a piece of foam for audio or similar applications.

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This foam was purchased to limit the amount of dust accumulating in two fan heaters. After covering the air inlet grills - and emptying the barrel fans of fluff, the hot air out the front almost burns again! The airflow is unaffected, drawing cooler room air, at the back, over the internal, over-temperature cutout. That airflow is preventing it from cutting out prematurely! This foam has worked like magic!