Customer reviews from Filterbuy
Filterbuy - 21.5x21.5x1 MERV 11 Pet & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (4-Pack) - Gold
Average customer rating
4.6
(3,905 Reviews)
Rating breakdown 3,905 reviews
5 Stars
3,098
4 Stars
390
3 Stars
196
2 Stars
88
1 Star
133
Customer Reviews for Filterbuy - 21.5x21.5x1 MERV 11 Pet & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (4-Pack) - Gold
Customer Rating
1
Poor quality
on February 24, 2026
Posted by: Anonymous
Some of the filters are no sealed to outer case all the way around them. Causing them to be useless.
Written by a customer while visiting Filterbuy
Customer Rating
5
right fit
on February 24, 2026
Posted by: Anonymous
the day i recieved the filters i installed one and it works very nice
Written by a customer while visiting Filterbuy
Customer Rating
5
Subscription???
on February 24, 2026
Posted by: Anonymous
Please unsubscribe me from any continuing unordered pruducts
Written by a customer while visiting Filterbuy
Customer Rating
5
Great company!
on February 24, 2026
Posted by: Anonymous
We were pleasantly surprised when the filters arrives so quickly and at a great price. The quality is good .
Written by a customer while visiting Filterbuy
Customer Rating
5
20x20x1 MERV 11
on February 23, 2026
Posted by: Anonymous
Pack of 6 costs about 1/2 as much as they would buying at a store.
Written by a customer while visiting Filterbuy
Customer Rating
4
Filters
on February 21, 2026
Posted by: Anonymous
They could stop more dust would be great have 3 filers in return and dust still gets thru
Written by a customer while visiting Filterbuy
Customer Rating
4
Filters
on February 21, 2026
Posted by: Anonymous
They work great but I wish I could find something little better we have 3 filter in our return and dust still get thru
Written by a customer while visiting Filterbuy
Customer Rating
5
Impressed!
on February 21, 2026
Posted by: Anonymous
Filters are sturdy and working much better than what I was buying. Great value for the price.
Written by a customer while visiting Filterbuy