Customer reviews from Filterbuy
Filterbuy - 20x20x4 MERV 11 Pet & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (12-Pack) - Gold
Average customer rating
4
(1,157 Reviews)
Rating breakdown 1,157 reviews
5 Stars
669
4 Stars
149
3 Stars
120
2 Stars
91
1 Star
128
Customer Reviews for Filterbuy - 20x20x4 MERV 11 Pet & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (12-Pack) - Gold
Customer Rating
4
16x20x4
on March 5, 2026
Posted by: Anonymous
filter is a loose fit in my heat pump, i expected them to fit like the Honeywell that the unit came with but your filters are somewhat smaller and the fit in the unit isnt as tight as with the more costly Honeywell. Im hoping the function is okay but one has to be careful to install the filter otherwise it slips out of position. not that impressed by your product, bought 4 so in a year I will re-evaluate your product to see if re-order or new supplier is better.
Written by a customer while visiting Filterbuy
Customer Rating
5
Excellent Company!
on March 5, 2026
Posted by: Anonymous
I can always count on FILTERBUY to deliver very prompt AC filters whenever I order them at a great price. I can highly recommend them. Their prices are also way better than their competitors.
Written by a customer while visiting Filterbuy
Customer Rating
5
Filters
on March 2, 2026
Posted by: Anonymous
I am a returning customer. I have always been pleased starting with ordering and receiving the filters. The filters are very good and do a great job.
Written by a customer while visiting Filterbuy
Customer Rating
5
Great value!
on March 2, 2026
Posted by: Anonymous
Have been purchasing from Filterbuy for the last several years. Will continue to do so.
Written by a customer while visiting Filterbuy
Customer Rating
4
It could fit a little
on March 2, 2026
Posted by: Beverly A.
It could fit a little tightr but fits better than any filter over the counter so am satisfied.
Written by a customer while visiting Filterbuy
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