3M #9808 15x24 Filtrete Air Conditioner Filter

I have been using the Filtrete Room Air Conditioner filters for three years and these are great. I cut the filters to fit with the inner AC filter-screen. Tape down and that is it. The amount of dust, dirt and pollution it collects so that it is not re-circulated inside is amazing. I had always suspected that there was dust and pollution circulating, but I had no idea. I could actually feel a difference. Now, I change them out every summer although the instructions say every two months. This is a must have so I stock up on them to save on shipping. I think the Filtera web-site is slightly cheaper if you buy in bulk and it has a $1 shipping promiotion on orders. Highly encourage you to buy once you see how much dirt it collects and how much cleaner your air-conditioned air is after a summer.

I knew the screen filter on my window unit was not adequate filteration for dust, etc so I decided to give Filtrete Room Filter a try. It works great! I've noticed a difference in the dust in the house. (No central air.) It has been three weeks and the filter looks pretty gross so I guess I'll be changing it fairly frequent. Also, I was able to cut one filter to fit two units: 5K BTU + 12K BTU.

My family lives in a 1920s bungalow without central air and heat. My son and I have been having atrocious allergies, so I ordered these filters. They were easy to install, and I was able to use two packages to filter three window units, as one of them is small. The first thing I noticed is that the back window unit, which normally smells musty when it is turned on, had no smell whatsoever. We turned on the window units at night, on fan, to filter the air. The next morning, everyone's allergies were gone. I cannot recommend this product highly enough for people who don't have central air. These inexpensive little filters are vastly superior to the freestanding HEPA air filter we have, that is for sure!