Customer reviews from Filterbuy
Filterbuy - 13x21.5x1 MERV 11 Pet & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (4-Pack) - Gold
Average customer rating
4.4
(7,007 Reviews)
Rating breakdown 7,007 reviews
5 Stars
5,174
4 Stars
754
3 Stars
439
2 Stars
245
1 Star
395
Customer Reviews for Filterbuy - 13x21.5x1 MERV 11 Pet & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (4-Pack) - Gold
Customer Rating
1
Returning filters is a nightmare
on March 6, 2026
Posted by: Anonymous
Incredibly expensive to ship back. Do not recommend. Buy your filters local when you can. Mistakes happen. Company is incredibly inflexible.
Written by a customer while visiting Filterbuy
Customer Rating
5
So glad I ordered these
on March 5, 2026
Posted by: Anonymous
So glad I ordered these filters. They work great. Would recommend them for homes, condos and apartments.
Written by a customer while visiting Filterbuy
Customer Rating
5
I am never without Quality Filters
on March 5, 2026
Posted by: Anonymous
My filters are replaced once every three months. I buy 4 at a time. I get a new set every year just before I pull the last filter from the furnace. It is practically automated.
Written by a customer while visiting Filterbuy
Customer Rating
2
Sized like lumber
on March 5, 2026
Posted by: Anonymous
The sizes are asinine. Just make them the actual sizes like some of the other brands
Written by a customer while visiting Filterbuy
Customer Rating
5
filters
on March 5, 2026
Posted by: Anonymous
have bought them before and they have been efficient. Will continue to use them
Written by a customer while visiting Filterbuy
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
These are perfect. . . . and affordable!
on March 5, 2026
Posted by: Anonymous
Like the title says, these air filters are working perfectly, plus they are more affordable than anywhere else. I'm so glad I found FilterBuy. They also ship super quickly.
Written by a customer while visiting Filterbuy