Customer reviews from Filterbuy
Filterbuy - 21x21.5x1 MERV 8 Dust & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (12-Pack) - Silver
Average customer rating
4.7
(5,914 Reviews)
Rating breakdown 5,914 reviews
5 Stars
4,907
4 Stars
499
3 Stars
213
2 Stars
113
1 Star
182
Customer Reviews for Filterbuy - 21x21.5x1 MERV 8 Dust & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (12-Pack) - Silver
Customer Rating
5
17x20x1 air filter
on March 6, 2026
Posted by: Anonymous
Exactly what I needed Best company to deal with period Thanks again
Written by a customer while visiting Filterbuy
Customer Rating
5
Custom fit
on March 5, 2026
Posted by: Anonymous
I submitted my exact custom filter size needs and they fit like a glove!
Written by a customer while visiting Filterbuy
Customer Rating
3
Waiting To Use My First Filterbuy's Filters
on March 5, 2026
Posted by: Anonymous
I can't give you an answer. When I replaced my last 14x14I ordered and received your filters. I probably have another month for the one that is in there, then after using Filterbuy's I can give you an answer.
Written by a customer while visiting Filterbuy
Customer Rating
5
Perfect fit!
on March 4, 2026
Posted by: Anonymous
Large filter for my heating and AC fits perfectly and is effective. I can tell by the change of color between the old filter and the new. Peace of mind.
Written by a customer while visiting Filterbuy
Customer Rating
5
Its a good product. The
on March 4, 2026
Posted by: Anonymous
Its a good product. The ordering process was easy.
Written by a customer while visiting Filterbuy
Customer Rating
5
Fits Perfect
on March 4, 2026
Posted by: Anonymous
Filter fit my unit perfectly and the filter quality is good.
Written by a customer while visiting Filterbuy
Customer Rating
5
These filters fit great, quality
on March 3, 2026
Posted by: Anonymous
These filters fit great, quality is top notch and orders are quick to arrive.
Written by a customer while visiting Filterbuy
Customer Rating
5
Great price
on March 2, 2026
Posted by: Anonymous
The only reason I purchased these AC filter was the price if buy in bulk, they seem high quality
Written by a customer while visiting Filterbuy