Customer reviews from Filterbuy
Filterbuy - 21x27x1 MERV 13 Smoke & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (2-Pack) - Blue
Average customer rating
4.6
(3,423 Reviews)
Rating breakdown 3,423 reviews
5 Stars
2,717
4 Stars
302
3 Stars
185
2 Stars
73
1 Star
146
Customer Reviews for Filterbuy - 21x27x1 MERV 13 Smoke & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (2-Pack) - Blue
Customer Rating
3
Too small
on June 21, 2026
Posted by: Customer
I ordered the size I needed and the 20x25 is a half in too small LxW. In order to get the exact size I need I have to special order then and it's 169. 00 for 6 of them.
Written by a customer while visiting Filterbuy
Customer Rating
5
Grate product
on June 21, 2026
Posted by: Customer
I've used this before in an older home. Now we are in a new construction apartment and works wonderfully.
Written by a customer while visiting Filterbuy
Customer Rating
4
I’m very happy to see
on June 20, 2026
Posted by: Customer
I’m very happy to see all 3 filters now come in one box. The price increase was quite a shocker. Not sure if I will continue with on line purchase or buy local
Written by a customer while visiting Filterbuy
Customer Rating
5
Frenchko
on June 19, 2026
Posted by: Customer
Love the filters high quickly and a very fair price
Written by a customer while visiting Filterbuy
Customer Rating
5
Cleaner air
on June 18, 2026
Posted by: Customer
The air quality in Phoenix valley is dusty and polluted. So far, after three weeks, inside air quality seems to be better. Time will tell.
Written by a customer while visiting Filterbuy
Customer Rating
5
Air filter Filterbuy
on June 17, 2026
Posted by: Customer
Very effective filter for my air conditioner traps a lot of my pet hair and the flow of the cooling air is smooth.
Written by a customer while visiting Filterbuy
Customer Rating
5
I know they are not
on June 17, 2026
Posted by: Customer
I know they are not 3M brand, however, they seem to work just well . . . . . . . . the size is perfect and they fit well. . . . they are a quality item and I know that because there is a smoker in my home and they help greatly clearing the house of smoke and it's awful left behind odor!
Written by a customer while visiting Filterbuy
Customer Rating
5
Excellent buy
on June 15, 2026
Posted by: Customer
The shipping was quick. The filter seems to be working well. With two old shedding pugs, the air in my house needs all the help it can get. My allergies seem to be better. If they really do last 3 months, then this was a fantastic buy. Only time will tell.
Written by a customer while visiting Filterbuy