[This review was collected as part of a promotion.] I've been buying this filter for a long time now because it works so well. My wife has allergy issues, but this filter makes her life normal.

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.

I've been using these products for over 10 years. I will search out stores that carry them and have been pleased with the increased efficiency levels the company keeps producing.

Just had a high effiency furnace installed last year and have a new 4" filter system. It does a great job and I have wonderful air quality in my home.

I’ve been using this filter for years now and my wife can breath freely not bothered by her multiple allergies no matter what’s going on outside with the pollen count!

My wife deals with asthma on a daily basis, and we have found Filtrete products to be invaluable in helping keep our household air free of allergens. "THANKS"

I've always used Filtrete since I bought my house 15 years ago but lately my spouse developed adult onset asthma and moving from the 800 to the 1200 product has made a huge difference in our air quality. Great for households with pets.

These filters are my fav! I change them out every 3 months and they work wonders. I noticed a difference in my husbands allergies when we started using these filters instead of the basic kind.

So far so good. I can't really tell a difference after a week. We recently moved into the house and I am not sure how old the other filter was. I've never bought such a large filter either. No complaints about it.

We use a gas fireplace as a supplement to our heat pump during the winter months and we have a cat. The filter keeps the coils on the indoor unit cleaner than another filter we have used in the past.