Customer reviews from Filterbuy
Filterbuy - 18x21x1 MERV 11 Pet & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (5-Pack) - Gold
Average customer rating
4.6
(3,952 Reviews)
Rating breakdown 3,952 reviews
5 Stars
3,137
4 Stars
393
3 Stars
199
2 Stars
89
1 Star
134
Customer Reviews for Filterbuy - 18x21x1 MERV 11 Pet & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (5-Pack) - Gold
Customer Rating
5
Great Filters
on February 20, 2026
Posted by: Anonymous
These filters are top quality at a price that is half that as the big box store sells for on a lesser quality. I have gotten them for my neighbors and family and business and wont buy from anywhere else.
Written by a customer while visiting Filterbuy
Customer Rating
5
Great filters and service.
on February 20, 2026
Posted by: Anonymous
I accidentally hit the click here button for I havent received my filters yet. This was an accident. I got my filters.
Written by a customer while visiting Filterbuy
Customer Rating
5
Time & cost
on February 19, 2026
Posted by: Anonymous
Money saving plus Time equals a better life style.Fast and reliable products and service.
Written by a customer while visiting Filterbuy
Customer Rating
5
Good filters
on February 17, 2026
Posted by: Anonymous
Have to order this size online but I get a good price and stock up
Written by a customer while visiting Filterbuy
Customer Rating
1
The density is too high
on February 17, 2026
Posted by: Anonymous
The core is so dense that i think its unhealthy for the hvac unit
Written by a customer while visiting Filterbuy
Customer Rating
3
It's ok for the price
on February 17, 2026
Posted by: Anonymous
The filter feels too thick like not breathable center .You get what you pay for
Written by a customer while visiting Filterbuy
Customer Rating
5
Do not send any more
on February 16, 2026
Posted by: Anonymous
Do not send any more filters unless i request them .
Written by a customer while visiting Filterbuy
Customer Rating
5
I have been using Filter
on February 15, 2026
Posted by: Anonymous
I have been using Filter Buy furnace filters for 20 years. They are well made and priced right. I change them out every 30 days.
Written by a customer while visiting Filterbuy