Used the Filtrete 2200 1" MPR filter until we had the furnace/air conditioner system replaced last year which has a 4" filter but the Filtrete 4" filter maximum filtration is a 1550 MPR...wish it came in the 2200 MPR.

I have used these filters since I've owned my home for 4 years. You can definitely tell they work! Barely any dust around my house and when I go to change it every 3 months it's definitely dirty!

Remember these filters are for Standard size Returns. However there are HVAC companies that deliberately use Grille size Returns to make a customer buy their filters. GRILLE SIZE Returns are slightly smaller than the Standard counterparts.

[This review was collected as part of a promotion.] My go to ! Super easy to put in, best preforming and doesn't fall apart! Works well with our unit! Makes our maintenance super easy my 8 years can do it !

I use this filter in my home with three cats and a dog. Filtrete helps keep the dust and dander to a minimum. I can't wait to try the Odor Reduction filter, too.

[This review was collected as part of a promotion.] I have been using these filters for a few years now & I notice that (this may sound strange) but not only are we sneezing less, but my cat is also.

I usually have used these in the past and recently purchased a different brand. I prefer these. They are better constructed and appear to better clear the air.

I know this filter works because when I change it, within the 90 day recommended time, with its fine filter capabilities, it really does its job as the filter is grey with particles.

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.

Since I started using this filter, I stopped getting sinus infections and suffer less from allergies! Great product. You can feel the effects of putting in a new air filter immediately.