Customer reviews from Filterbuy
Filterbuy - 21x21x4 MERV 11 Pet & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (12-Pack) - Gold
Average customer rating
4
(1,144 Reviews)
Rating breakdown 1,144 reviews
5 Stars
660
4 Stars
148
3 Stars
119
2 Stars
91
1 Star
126
Customer Reviews for Filterbuy - 21x21x4 MERV 11 Pet & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (12-Pack) - Gold
Customer Rating
5
Filterbuy Makes it Easy
on July 7, 2025
Posted by: Anonymous
I recently purchased a MERV 11 filter and found every touchpoint with Filterbuy to be easy, fast, and professional. I esp. liked the video that showed how to install the new filter along with other tips.
Written by a customer while visiting Filterbuy
Customer Rating
5
The filter medium is more
on July 7, 2025
Posted by: Anonymous
The filter medium is more durable and a little thicker. I like the looks of the filter box, i. e the outer frame of the filter. It is more durable and stronger when installed and removing.
Written by a customer while visiting Filterbuy
Customer Rating
5
Completely satisfied with purchase, reasonable
on July 5, 2025
Posted by: Anonymous
Completely satisfied with purchase, reasonable and quality too!
Written by a customer while visiting Filterbuy
Customer Rating
5
Just got it. fits well.
on July 5, 2025
Posted by: Anonymous
Just got it. fits well. Seems high quality, Very pleased!
Written by a customer while visiting Filterbuy
Customer Rating
5
My AC Filter GoTo!
on July 4, 2025
Posted by: Anonymous
These are quality filters at an affordable price! Why get in your car and drive around town when you can click and buy these!
Written by a customer while visiting Filterbuy
Customer Rating
1
I was charged for the
on July 4, 2025
Posted by: mitchell i.
I was charged for the Merv 13 air filters and given the Merv 11 air filters, true to size is not even close it barely fits in its designated area even though the one I pulled out says it's the exact same size
Written by a customer while visiting Filterbuy
Customer Rating
1
Filters are smaller than labeled
on July 2, 2025
Posted by: Anonymous
Been a Filter Buy customer for years and loved them and their products. Never had any issues. Recently bought a new HVAC system that takes 16x25x4 filters. It was time to make my first filter change and put the new FilterBuy one in and it was smaller, leaving gaps. Took it out and put it next to the old one and it was smaller. Only about 3. 25 inches tall and only 15. 25 inches wide. This caused the filter to not fit snuggly and allows air to flow around it unfiltered into my system. I bought a pack of 3 and all three were not 16x25x4, all were smaller than labeled. Unfortunate, because I liked FilterBuy.
Written by a customer while visiting Filterbuy
Customer Rating
5
Awesome
on June 28, 2025
Posted by: Danielle C.
Awesome service, awesome product, awesome deliver and communication. Just easy and the best price around for furnace filters.
Written by a customer while visiting Filterbuy