Customer reviews from Filterbuy
Filterbuy - 20x20x4 MERV 8 Dust & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (6-Pack) - Silver
Average customer rating
4.6
(7,982 Reviews)
Rating breakdown 7,982 reviews
5 Stars
6,413
4 Stars
704
3 Stars
347
2 Stars
212
1 Star
306
Customer Reviews for Filterbuy - 20x20x4 MERV 8 Dust & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (6-Pack) - Silver
Customer Rating
5
Merv 8 Filterbuy
on March 6, 2026
Posted by: Anonymous
It's pretty good for my furnace it's been absorbing all the dust. . . I smell the air better.
Written by a customer while visiting Filterbuy
Customer Rating
5
furnace filters
on March 6, 2026
Posted by: Anonymous
great quality and the best price i've ever seen even from the big box stores.
Written by a customer while visiting Filterbuy
Customer Rating
5
furnace filters
on March 6, 2026
Posted by: Anonymous
excellent product and the best price i've ever seen on filters. not even big box stores can beat these prices for the quality.
Written by a customer while visiting Filterbuy
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
2
Quality is slipping with every order
on March 5, 2026
Posted by: Anonymous
Pleats are being bunched up on ends while stretched in the middle. Over 30% of the filter is not useable! All 6 filters out 6 ordered were this way.
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