I have used these filters for years. They say they are good for the whole year, though I still change mine out every 6 months. Ordered through Walmart as they were the only place I could currently find them amidst all this COVID crap going on

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 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!

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.

Our HVAC was installed over 8 years ago. We change the filter every 6 months at during our spring/fall checkups. During a recent home inspection for our refinancing. The inspector asked did we recently change the airvents and ducts?

[This review was collected as part of a promotion.] I've purchased this filter for 4 years now, ever since I moved into my new house. I like it because it performs well and as expected.

I upgraded from the Allergant Protector (also a great filter) just to see if I could tell a difference. I can! The air seems cleaner and it gives me peace of mind knowing that it helps with bateria and viruses.

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.

I DON'T BUY ANY OTHER FILTER. I HAVEN'T FOUND ANOTHER FILTER THAT WORKS AS WELL AS THIS ONE. SINCE I SUFFER FROM ALLERGIES, THIS FILTER MAKES IT EASIER TO TOLERATE IT. MY EYES DON'T ITCH ANYMORE.

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!