Customer reviews from Filterbuy
Filterbuy - 21x21x4 MERV 13 Smoke & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (4-Pack) - Blue
Average customer rating
4.1
(1,155 Reviews)
Rating breakdown 1,155 reviews
5 Stars
716
4 Stars
109
3 Stars
127
2 Stars
88
1 Star
115
Customer Reviews for Filterbuy - 21x21x4 MERV 13 Smoke & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (4-Pack) - Blue
Customer Rating
5
Best place to buy filters
on January 26, 2014
Posted by: Anonymous
Could not find a replacement for my Lennox system and AirFilterBuy had them. best place to buy replacement filters.
Written by a customer while visiting Filterbuy
Customer Rating
3
Love the service, disappointed with the filter size
on January 26, 2014
Posted by: Ken N.
The filters don't fit my units that well. They are designed for a filter that is truly 4" wide and these are not.
Written by a customer while visiting Filterbuy
Customer Rating
2
Beware of the size!
on January 17, 2014
Posted by: Charlene S.
While the prices are very good, the 16x25x4 filters are actually smaller than that, as I now see in parentheses next to the size. The Honeywell filters I have bought in the past are actually 16x25x4. The smaller filters leave a significant gap in the air cleaner; if I had realized this I would not have bought them!
Written by a customer while visiting Filterbuy