Customer reviews from Filterbuy
Filterbuy - 12x20x4 MERV 11 Pet & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (12-Pack) - Gold
Average customer rating
4
(1,144 Reviews)
Rating breakdown 1,144 reviews
5 Stars
660
4 Stars
148
3 Stars
119
2 Stars
91
1 Star
126
Customer Reviews for Filterbuy - 12x20x4 MERV 11 Pet & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (12-Pack) - Gold
Customer Rating
1
Poor sizing
on February 28, 2026
Posted by: Anonymous
Buyer beware: the filters are listed as having a width of FOUR (4) inches, but theyre short-sized at THREE AND THREE-QUARTERS (3 3/4) inches.Dissatisfied.
Written by a customer while visiting Filterbuy
Customer Rating
5
Timely and good fit
on February 24, 2026
Posted by: Anonymous
Been using them for years and no real trouble. Always timely and durable filters.
Written by a customer while visiting Filterbuy
Customer Rating
2
First 20x20x4 filter Ive ever had not fit
on February 17, 2026
Posted by: Anonymous
I understand it shows actual size. However, for the 15 years Ive been buying filters, this is the first time Ive ever bought the size 20x20x4 and it DOES NOT FIT. But then I have to pay return because the filter size isnt as shown. Many other companies with accurate sizes!
Written by a customer while visiting Filterbuy
Customer Rating
1
Merv 11
on February 17, 2026
Posted by: Anonymous
Didnt think I ordered them as I still ha ve box and half. There great but Im not a store house.
Written by a customer while visiting Filterbuy
Customer Rating
3
Recent filter purchase
on February 15, 2026
Posted by: Anonymous
The 16X25X4 filters were a bit smaller than the honey wells I used to buy (they fit my opening perfectly) I actually had to shim up filterbuys. I can't understand why filterbuys would be smaller than Honeywells.
Written by a customer while visiting Filterbuy
Customer Rating
1
Im so upset about this
on February 14, 2026
Posted by: Anonymous
Im so upset about this because I did not subscribe it. Number one in the number two is without my permission. You charge my card and send me the filters when I already have them so that was very disappointing.
Written by a customer while visiting Filterbuy
Customer Rating
2
Poor Packaging
on February 12, 2026
Posted by: Anonymous
The filters are fine. I am not sure what is going on with packaging but sending four filters without a box with cheap tape is a terrible idea. If this is the new plan for packaging I will be taking my business elsewhere. By the time my filters made it to me the cheap tape broke and the filters were all over the place. Thats a terrible way to cut costs.
Written by a customer while visiting Filterbuy
Customer Rating
5
Process was very easy! I
on February 12, 2026
Posted by: Anonymous
Process was very easy! I have been receiving facebook contacts that they are now up to 70% off. . . . can I still get this discount?Thanks,
Written by a customer while visiting Filterbuy