[This review was collected as part of a promotion.] I just put this in our new home for the first time, and literally made a difference immediately! Love this product!

[This review was collected as part of a promotion.] These are the best furnace filters I have used. They have made a noticeable difference in the air quality in the house and the number of colds & sinus problems we go through during the winter.

[This review was collected as part of a promotion.] I have used these filters in my home for 11 months and I'm very pleased how clean the internals of my furnace are. Plus I know it's also removing that dirt from the circulating air

[This review was collected as part of a promotion.] I started using the Allergen Defense Air Filters and have had a decrease in the allergies that I have. Love the product and will continue using this. Thanks so much.

[This review was collected as part of a promotion.] for the price i paid i think this is a good buy. i highly recommend and specially with a husband with allergy through out the year this helps to prevent it

[This review was collected as part of a promotion.] We have used this filter for several years because my wife has allergies and appreciates its effectiveness. It lasts 3 months and keeps my air system clean.

[This review was collected as part of a promotion.] I've tried other brands of filters, but have not found any that work as well as Filtrete. I is the only brand I buy now.

[This review was collected as part of a promotion.] I am more than pleased with the performance of Filtrete's furnace filters. This is my 3rd one, love it's performance and never plan on switching

[This review was collected as part of a promotion.] The level of dust visible on dark furnitures has been noticeably reduced with this filter .. very pleased

Great price, I have one 20 by 30 by 1 and 3 -20 by 20 by 1. The 20 by 20 fits perfectly. However the 20 by 30 is too big and I fight with it to get installed, I haft to squeeze it in by bending it. Other brands have been no issues.