Breathe Naturally Universal Cut To Fit Activated Carbon Air Filter - Replacement Charcoal Air Filters - Carbon Filter Sheet for Air Purifier, Vent Filters & More - Made in USA (Pack of 2, 16x48)

I have an LG high efficiency window A/C. It has a washable filter over the evaporator coils and an electronic reminder to tell us when the filter should be cleaned. All well and good, EXCEPT that the filter is thin and cheaply made. It doesn't prevent a fairly rapid buildup of gunk on the internal evaporator coil, the fan, and the internal ductwork. Once all those components have a layer of dust and gunk all over them, the heat exchange suffers from the insular properties of the crud on the coils and the airflow is further reduced by the build-up on the fan. In short, the efficiency I paid extra for is lost until the unit is uninstalled, deep cleaned and put back in the window. What a pain! Breathe Naturally cut-to-fit filter material and some adhesive Velcro strips solved the problem almost completely. I put the Velcro "hook" half of the adhesive Velcro kit around the perimeter of the evaporator coil intake and some more around the two side and one bottom air intake vents molded into the case. (Search Amazon for adhesive velcro and you'll find what you need.) Then I installed Breathe Naturally filter material over all of these places - using the velcro to hold the Breathe Naturally material in place and make a good seal around the edges. The 1st set of Breathe Naturally filters over the intake vents pre-filter the air. The 2nd filter over the condenser coil inside the hinged front cover provide a secondary filtration stage. Lastly, the A/C's flimsy little factory filter - sitting between the cut-to-fit filter and the condenser - gets a third chance to stop particulates. In addition, the carbon in the Breathe Naturally filter material also does a great job of keeping the air coming out of the A/C smelling fresh and clean. I replace the Breathe Naturally materials about once every three months - and vacuum the surface dust off of them each time the "clean the built in filter" reminder light comes on. I also wash the factory filter at that time. I really love the performance and lack of odor and have yet to notice any visible buildup of crud on the A/C internals. Now I always have the high efficiency performance I paid extra for! All you need for this project is a measuring tape or ruler and a pair of scissors. A very easy and very effective DIY enhancement!

These a very thick and durable. Easy to cut and fit into my AC unit. I also used them to line my cat’s litter box and I believe it did help a lot with the smell and dust that leaves the box. You also get so much in the pack. Great product!

Works well

Carbon fibre pre-filters do a great job of minimising odours and catching material allowing your expensive HEPA filter to last longer by filtering out ultra small particulate matter. Without a pre-filter it clogged up very fast so this saves you money in the long run and it’s easily washable.

Nice quality cut-to-fit filters. Not too thin. Made in USA. Will be buying again. Seems like best bang for the buck on Amazon

Works well

I needed these because we live in a downstairs apartment and share vents with cigarette smokers. If you don’t smoke then you know how bad it can smell and they start smoking at 5am. I took the vents down and cut the filter to size and just put them back up. There’s plenty left to change them out in 3 months. Results: they kinda work. I still smell the awful cigarettes through the vents but it’s not as powerful as it is without them . There’s plenty of air flow out of the filter but I’m slightly disappointed there is still a smell.

Seems to work just fine, not sure why people are complaining about thickness, it seems thick to me. I put it around my tower fan and seems to help. 👍

Normal quality

I bought the 24" x 24". They are about 2 mm thick (0.07" thick - not 0.2" as advertised). Not at all sufficient for what is needed. Flimsy. Super disappointed.

I have an older round honeywell air cleaner and can't get filters in my store anymore (they say my model is too old) This fit, was long enough to get all the way around the permanent filter and I will be able to get a second one out of the material left over. It filters well. We've had a lot of forest fire smoke and my air cleaner is running non stop - no trace of smoke in my apartment

Work as advertised and the customization option is useful

Seems to do the intended job. I wrap the filter in my air purifier. I vacuum it off weekly and it seems to work for about a 6 month. I've read that you can wash and reuse this type filter, but they really don't work once washed, because all the charcoal washes out.