Over the years we have tried dozens of filter, since we switched to Filtrete we have not tried any others. This product works, we have cats, dog, and it keeps the air clear and fresh.

I've been using the Filtrete allergen filters for over 8 years in my forced air furnace/AC unit. I can breathe better and the house has reduced dust. It makes for easier cleaning!

We have used these over the past four years. Have allergies and noticed the difference once we started using filtrate. Just wish they sold them in a 6 pkg. We bought the 20x30x1.

Purchased this after some work on air conditioner. I will continue to purchase these filters as opposed to the cheap ones. Improvements in odor, dust.

The Filtrete products are the best 4 inch filter I've ever used. Would recommend it to anyone else not happy with their current product. Less dusting is always appreciated. My allergies are thankful too.

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!

My recommend filter is Lennox X6670 16”x25”x5” I tried this one 16”x25”x4” and it actually fit perfect. The exact dimensions I got for both are very similar alike and tried it out and it worked.

I have used this filter since 2000. It is the best! I have two cats and and it removes the dander wonderfully. Only problem is that not all stores sell my size so I purchase 4 to 6 at a time.

I change our filters quite often due to dust and allergens that get circulated in our home. I find out filters last 2 months but I change them after 1 month. I’m going to the highest level filter shortly.

With 3 dogs, 2 cats, kids and husband, I need all the filtering I can get. I notice when I forget to change it. Air conditioning was boggind down. Bill seems more.