Customer reviews from Filterbuy
Filterbuy - 21x21.5x1 MERV 11 Pet & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (3-Pack) - Gold
Average customer rating
4.6
(3,994 Reviews)
Rating breakdown 3,994 reviews
5 Stars
3,170
4 Stars
398
3 Stars
200
2 Stars
90
1 Star
136
Customer Reviews for Filterbuy - 21x21.5x1 MERV 11 Pet & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (3-Pack) - Gold
Customer Rating
5
Great filter
on November 12, 2026
Posted by: Customer
I have been purchasing these filters for several years and couldn’t be more pleased. I replace them every 90 days so that I am continually breathing nice, fresh smelling air.
Written by a customer while visiting Filterbuy
Customer Rating
5
Good flowers
on November 12, 2026
Posted by: Customer
I have used this package yet. It's a setup up. But live the originals
Written by a customer while visiting Filterbuy
Customer Rating
5
The standard MERV 11 filter
on November 12, 2026
Posted by: Customer
The standard MERV 11 filter is working great unlike the one with the charcoal in it. It is at a good price point. The frame is robust unlike the one with the charcoal in it.
Written by a customer while visiting Filterbuy
Customer Rating
5
Quality, Selection and Price
on November 6, 2026
Posted by: Customer
I’ve been using FilterBuy for a long time. I find their products to be of equal or higher quality than most major brands. They do not try to up-sale products, they give you the choices, inform you of the differences and let you make the choice. I can’t even remember the last time I purchased anything else, it doesn’t make sense.
Simple and strait forward.
Simple and strait forward.
Written by a customer while visiting Filterbuy
Customer Rating
5
Good price, reduced my allergies
on November 6, 2026
Posted by: Customer
Price was the best I could find and my allergies (runny nose) definitely reduced with it going.
Written by a customer while visiting Filterbuy
Customer Rating
4
Filter
on November 4, 2026
Posted by: Customer
First time using them . Read good reviews decided to try them
Written by a customer while visiting Filterbuy
Customer Rating
5
Merv11 pleated filters
on November 4, 2026
Posted by: Customer
These filters work great. Change them every month. Not expensive. Thanks *****
Written by a customer while visiting Filterbuy
Customer Rating
4
A little smaller than the
on November 4, 2026
Posted by: Customer
A little smaller than the advertised 16x20. Makes it easier to install.
Written by a customer while visiting Filterbuy