These filters are difficult to fine in stores because of their size. The cost is way more than other size filters, and I fail to see why because they are basically paper and a wire mesh construction.

We use to buy the "cheap" drug store air filters and thought they were doing a decent job of filtering. Since we changed to Filtretes our house is cleaner and my furnace internals stay cleaner.

Expensive but lasts a long time...not the twelve months it says in the ad. We change every three months but we live in the South for the air conditioner runs a bunch.

We have used Filtrete for years and it works fantastic. Because it works so well, we find ourselves changing the filter more often than the package says. It is amazing how much it collects and keeps out of our air.

Put the model 16x25x4 in Bryant furnace, after one run the cardboard retaining material was sucked in and had to destroy it to get it out. As a 3M stockholder I am not happy\.

For the second time in a row, when the air flows to the air conditioning unit, this product literally falls apart. It separates from the flimsy cardboard border.

I have asthma and since I discovered Filtrete filters I use them exclusively because they help me keep my asthma under control by removing allergens from the air that enters my home.

I've used various filters and found this model to be very effective. Amazed at what it actually catches from the normal air. Noticeably helps during the allergy seasons (severe hayfever).

We have been using these for years, living in Florida and believe that these filters keep down the amount of pollen from outside and dander from our 2 dogs inside.

This filtering system is wonderful for our basement. We have two plant tables in the winter that are over 6' long, and the Filtrete really clears the air!