Customer reviews from Filterbuy
Filterbuy - 21x23.5x1 MERV 11 Pet & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (3-Pack) - Gold
Average customer rating
4.6
(3,949 Reviews)
Rating breakdown 3,949 reviews
5 Stars
3,135
4 Stars
393
3 Stars
198
2 Stars
89
1 Star
134
Customer Reviews for Filterbuy - 21x23.5x1 MERV 11 Pet & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (3-Pack) - Gold
Customer Rating
5
Great filters
on March 1, 2026
Posted by: Anonymous
These furnace filters fit perfectly, work well and don't have to be changed for several months. Great value also.
Written by a customer while visiting Filterbuy
Customer Rating
5
Great price
on March 1, 2026
Posted by: Anonymous
I always get good quality furnace filters for a good price.
Written by a customer while visiting Filterbuy
Customer Rating
5
Filters
on March 1, 2026
Posted by: Anonymous
Highly impressed with the filters.Will definitely order again
Written by a customer while visiting Filterbuy
Customer Rating
5
Just what the doctor ordered.
on February 28, 2026
Posted by: Anonymous
Just what the doctor ordered. They are great. Thanks
Written by a customer while visiting Filterbuy
Customer Rating
5
MERV 11 Review
on February 28, 2026
Posted by: Anonymous
Great filters, arrive on schedule and install easily.
Written by a customer while visiting Filterbuy
Customer Rating
5
20x30x1 MERV 11 Pleated Air Filter
on February 28, 2026
Posted by: Anonymous
We have been using the 20x30x1 MERV 11 Pleated Air Filtes for about a. The filter does a very good job of trapping fust particles. Another positive is I do not have to remember to purchase a new filter. Filterbuy automatically sends me a replacement filter every 3 months. I recommend Filterbuy.
Written by a customer while visiting Filterbuy
Customer Rating
5
Easy to get
on February 27, 2026
Posted by: Anonymous
Love that they co. e every month and I dont have to remember to buy them.
Written by a customer while visiting Filterbuy
Customer Rating
5
Quality
on February 27, 2026
Posted by: Anonymous
Just started using them. Been in my housing for about 3 weeks. Will review again and another two weeks
Written by a customer while visiting Filterbuy