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
(5,913 Reviews)
Rating breakdown 5,913 reviews
5 Stars
4,906
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
Easy selection, gets to me
on March 9, 2026
Posted by: Anonymous
Easy selection, gets to me quick and is good quality. The size fits perfect.
Written by a customer while visiting Filterbuy
Customer Rating
5
Filterbuy
on March 9, 2026
Posted by: Anonymous
The filters I purchased for my heat pump are great ! Good quality and a terrific price ! Thank you !
Written by a customer while visiting Filterbuy
Customer Rating
5
20x20x1" filters
on March 9, 2026
Posted by: Anonymous
These work great. I ama returning customer. Can't beat the price. Love this brand.
Written by a customer while visiting Filterbuy
Customer Rating
5
Furnace filters
on March 9, 2026
Posted by: Anonymous
I like these filters since they fit snugly yet not so tightly that they are difficult to remove and insert. . I have been using them for a couple of years. They fit much better than the 3M Filtrete.
Written by a customer while visiting Filterbuy
Customer Rating
5
Im okay with these because
on March 9, 2026
Posted by: Anonymous
Im okay with these because they are what I needed but the 20x20x1 Im not happy at all and I tried to make changes when I seen it was the wrong size :thinking: no one cared to even bother so I am done
Written by a customer while visiting Filterbuy
Customer Rating
5
Filter Pack-6 count
on March 9, 2026
Posted by: Anonymous
I stumbled upon Filterbuy a few years ago. The local, big box do-it-yourself stores never seemed to stock the odd filter size I need. Filterbuy always has them and at a lower price; I recommend Filterbuy!
Written by a customer while visiting Filterbuy
Customer Rating
1
Incorrect size
on March 9, 2026
Posted by: Anonymous
When I compared my 18x24x1 that I bought from your company to the one I already had in my AC I realized it was noticeably smaller
Written by a customer while visiting Filterbuy
Customer Rating
5
Always A++++++
on March 8, 2026
Posted by: Anonymous
Love this companys I have purchased from this company for several years! They have the right sizes! Fast Ship! Excellent Quality! Never have I had any issues! I think their prices are good too! Than you!!
Written by a customer while visiting Filterbuy