Customer reviews from Filterbuy
Filterbuy - 20x21x1 MERV 8 Dust & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (4-Pack) - Silver
Average customer rating
4.7
(5,980 Reviews)
Rating breakdown 5,980 reviews
5 Stars
4,965
4 Stars
505
3 Stars
214
2 Stars
114
1 Star
182
Customer Reviews for Filterbuy - 20x21x1 MERV 8 Dust & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (4-Pack) - Silver
Customer Rating
5
Great Company Great Products
on November 11, 2026
Posted by: Customer
Filterbuy maintains an excellent selection of filters for their customers. Their site is very user friendly, and shipments go out very quickly.
Written by a customer while visiting Filterbuy
Customer Rating
4
Speed - was great -
on November 10, 2026
Posted by: Customer
Speed - was great - 👍👍👍👍
Quality - 5 of my 6 were in great shape - one was I ok shape but some damage to it
Installation - a piece of cake, but I’ve installed them every month since I’ve had the furnace 👍
Written by a customer while visiting Filterbuy
Customer Rating
5
Great filters
on November 9, 2026
Posted by: Customer
This is my second purchase. These filters are better and less expensive than most at the big box stores!
Written by a customer while visiting Filterbuy
Customer Rating
3
I don't really know I
on November 9, 2026
Posted by: Customer
I don't really know I just started using it. But I don't like being roped into automatic billing.
Written by a customer while visiting Filterbuy
Customer Rating
5
I bought these filters in
on November 7, 2026
Posted by: Customer
I bought these filters in the past they are excellent filter and they are the right fit every time
Written by a customer while visiting Filterbuy
Customer Rating
5
These filters fit my registers
on November 7, 2026
Posted by: Customer
These filters fit my registers better than any others.
Written by a customer while visiting Filterbuy
Customer Rating
5
Furnace air filters
on November 6, 2026
Posted by: Customer
LIke to get these mail order....convenient and cheaper than what you purchase in store front.
Written by a customer while visiting Filterbuy
Customer Rating
5
Home Run
on November 6, 2026
Posted by: Customer
Just what I needed, saved a store trip, free ship, price match, made my day!
Written by a customer while visiting Filterbuy