Customer reviews from Filterbuy
Filterbuy - 20x20x4 MERV 11 Pet & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (6-Pack) - Gold
Average customer rating
4.4
(7,001 Reviews)
Rating breakdown 7,001 reviews
5 Stars
5,169
4 Stars
754
3 Stars
438
2 Stars
245
1 Star
395
Customer Reviews for Filterbuy - 20x20x4 MERV 11 Pet & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (6-Pack) - Gold
Customer Rating
5
Second Shipment!
on March 1, 2026
Posted by: Anonymous
Great product! We have the furnace going all the time, and it's perfect timing to replace these monthly!
Written by a customer while visiting Filterbuy
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
1
Poor sizing
on February 28, 2026
Posted by: Anonymous
Buyer beware: the filters are listed as having a width of FOUR (4) inches, but theyre short-sized at THREE AND THREE-QUARTERS (3 3/4) inches.Dissatisfied.
Written by a customer while visiting Filterbuy