Customer reviews from Filterbuy
Filterbuy - 20x21x1 MERV 13 Smoke & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (4-Pack) - Blue
Average customer rating
4.6
(3,408 Reviews)
Rating breakdown 3,408 reviews
5 Stars
2,706
4 Stars
301
3 Stars
184
2 Stars
73
1 Star
144
Customer Reviews for Filterbuy - 20x21x1 MERV 13 Smoke & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (4-Pack) - Blue
Customer Rating
5
I love them
on March 4, 2026
Posted by: Anonymous
I really like these filters, theyre made in the USA which is a huge plus for me, they ship really quickly, and I like the way they control the dust in our home!
Written by a customer while visiting Filterbuy
Customer Rating
5
Wrong size
on March 4, 2026
Posted by: Anonymous
I bought a pack of 5 filters, 1x16x25 as jeed for my New HVAC,but they are little smaller for my unit, not good to run unit with smaller filter, defeat the purpose
Written by a customer while visiting Filterbuy
Customer Rating
5
Great value
on March 3, 2026
Posted by: Anonymous
Definitely a great quality product for an affordable price
Written by a customer while visiting Filterbuy
Customer Rating
5
Not time to change the
on March 3, 2026
Posted by: Anonymous
Not time to change the filter. Can update in app Sept 2026
Written by a customer while visiting Filterbuy
Customer Rating
5
Incredible company
on March 3, 2026
Posted by: Anonymous
Who are the little elves who made my custom sized filters & sent them on their merry way , in a blink ?
Written by a customer while visiting Filterbuy
Customer Rating
1
Filter
on March 3, 2026
Posted by: Anonymous
These filters are a bit oversized and do not fit properly
Written by a customer while visiting Filterbuy
Customer Rating
2
I didnt try yet
on March 3, 2026
Posted by: Anonymous
So I gave you two starts because I havent tried your filters yet when the season gets warmer I will let you know then
Written by a customer while visiting Filterbuy
Customer Rating
4
the filter is a little
on March 2, 2026
Posted by: Anonymous
the filter is a little smaller than it should be the other filters I buy fit more tighter than yours
Written by a customer while visiting Filterbuy