Customer reviews from Filterbuy
Filterbuy - 20x21x1 MERV 13 Smoke & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (1-Pack) - Blue
Average customer rating
4.6
(3,422 Reviews)
Rating breakdown 3,422 reviews
5 Stars
2,716
4 Stars
302
3 Stars
185
2 Stars
73
1 Star
146
Customer Reviews for Filterbuy - 20x21x1 MERV 13 Smoke & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (1-Pack) - Blue
Customer Rating
1
They are too I would not take them back.
on October 19, 2026
Posted by: Customer
The filters were too big and FilterBuy would not let me exchange or refund them. I now have to cut all my filters to get them to fit or just throw them away. This was not a good solution.
Written by a customer while visiting Filterbuy
Customer Rating
5
Rover
on October 19, 2026
Posted by: Customer
These filters work very well for my home . I use Merv 13 air filters. Filters are made well. I would order again.
Written by a customer while visiting Filterbuy
Customer Rating
5
Subscription Service is Amazing
on October 18, 2026
Posted by: Customer
I signed up for the subscription service last year. Right on time, the box came with enough filters for the next year. No digging for sizes or running around to a number of stores looking for the size I needed. Convenient. Cost effective. Made in the USA.
Written by a customer while visiting Filterbuy
Customer Rating
5
Have been getting my filters
on October 13, 2026
Posted by: Customer
Have been getting my filters for about 3 years now. Always shipped on time and they fit perfect. Thank you so much !!
Written by a customer while visiting Filterbuy
Customer Rating
3
1 inch is not.75 as
on October 13, 2026
Posted by: Customer
1 inch is not.75 as I was told. My filter is ecactly.75. Had to crush the sides to make it fit and made some cuts to make it work. Otherwise it appears okk
Written by a customer while visiting Filterbuy
Customer Rating
5
Very pleased!
on October 12, 2026
Posted by: Customer
Thank you for making the purchase of our odd-sized filters so very easy and pleasant. We are all set for awhile. Nice quality too!
Written by a customer while visiting Filterbuy
Customer Rating
5
The best
on October 11, 2026
Posted by: Customer
Best filters I have ordered…always on time and last the at least 2 months
Written by a customer while visiting Filterbuy
Customer Rating
5
Nice and easy site to
on October 10, 2026
Posted by: Customer
Nice and easy site to use, prices are really good highly recommended
Written by a customer while visiting Filterbuy