Breathe Naturally Universal Cut To Fit Carbon Activated Air Filter - Replacement Charcoal Filters - Pre Filter Carbon Sheet for Air Purifier, Vent Filters & More - Packed in USA (Pack of 4, 16x48)

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!

This filter does exactly what it promises and doesn’t try to be anything fancy about it and honestly, that’s a win. It’s easy to cut to size, fits perfectly in my portable and window air conditioners, and installs without any drama. I use these mainly to help catch dust, pet hair, and general household “mystery particles,” and they’ve been doing a solid job. Airflow hasn’t been noticeably restricted, and the added carbon layer is a nice bonus for improving overall air quality. Nothing complicated here: cut it, install it, forget about it. If you want a no-nonsense filter that works and is easy to customize, this one gets the job done.

The product is ok, I guess. I haven't really used it. I just received it after waiting 38 days. The company proudly boasts that this product is made in the USA. Company is in Minnesota. I went directly to the company website and started a chat communication asking about the month and a half shipping time estimate, and never received a response. I used the chat feature during normal business hours. It appears no one's home. No one making product, shipping product, or responding to consumers.

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!

Works as a pc case filter. Great value.

I use this all over my house, I have a variety of air filters, some store bought, some home made. I use these in all of them as a layer of my filter stack. works great to eliminate certain smells, mostly cooking and smoking smells. when they get full I rinse them, after a few times of this they are pretty thin and useless. This is a consumable item. they dont last forever, but they do good work while they last.

The product description was incorrect. This product is not .5 inches thick, it is 1/16th inch thick

I really like that they filter the air from the heat vents, and we can breathe better. I also like that we are not limited to a particular size and we can cut them to whatever size we need.

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

Great price, plenty of sizeable options that I can cut with ease. 12x48 gives me double the filter size I need for a great price. Can’t wait to breathe better.

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.

We have a neighbour below us who has cats. The smell of cat litter comes up through a vent that lets out onto the landing of our stairs to the second floor. It's relatively subtle, but definitely there. I cut out a piece of this filter and fit it behind the grill of the vent. We now never notice the cat litter smell!