Customer reviews from Filterbuy
Filterbuy - 18x36x4 MERV 13 Smoke & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (6-Pack) - Blue
Average customer rating
4.1
(1,141 Reviews)
Rating breakdown 1,141 reviews
5 Stars
705
4 Stars
109
3 Stars
127
2 Stars
86
1 Star
114
Customer Reviews for Filterbuy - 18x36x4 MERV 13 Smoke & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (6-Pack) - Blue
Customer Rating
1
Smaller Than the Size States
on February 6, 2026
Posted by: Anonymous
These filters aren't the measurement indicated. Received ours and put one in the furnace and it flip flopped from side to side and top to bottom. Our furnace company said that this will cause the furnace to work harder putting undo strain on it. We returned the filters.
Written by a customer while visiting Filterbuy
Customer Rating
1
Bought wrong size due size
on October 6, 2025
Posted by: Anonymous
Bought wrong size due size not equaling measurements, had to buy another size and throw this out.
Written by a customer while visiting Filterbuy
Customer Rating
5
Great Price!!
on October 6, 2025
Posted by: Anonymous
GREAT price and work just as good as more expensive filters. I actually think these are better. My house isn't as dusty as it used to be.
Written by a customer while visiting Filterbuy
Customer Rating
5
Perfect fit
on September 27, 2025
Posted by: Anonymous
The fit and size were spot on. Just what i needed.
Written by a customer while visiting Filterbuy
Customer Rating
5
Merv 13 Pleated air Filter
on September 20, 2025
Posted by: Anonymous
Have been using this product for 2 plus years. Upon upgrading to the Merv 13 filtration, I noticed some dustballs collecting on the filters after first couple of filter changes. Now, no dustballs. These filters use "nominal" sizing. I had to add shims to filter box in order to prevent air bypass. I use the 4" deep filters and change every 4 months. I'm very satisfied with performance of these filters and will continue to use.
Written by a customer while visiting Filterbuy
Customer Rating
5
Just whats needed
on September 6, 2025
Posted by: Anonymous
This filter saves us the hassle of too frequent cleaning the house, being in a construction zone.
Written by a customer while visiting Filterbuy
Customer Rating
5
Excellent company to deal with
on September 5, 2025
Posted by: Anonymous
[This review was collected as part of a promotion.] I've dealt with Filterbuy 3 times and they have always had great service and products. The filters are as good or better than name brands and you can find any size you need. They are also made in USA with an excellent price and shipped free. I definitely recommend this company.
Written by a customer while visiting Filterbuy
Customer Rating
5
4 filter
on September 3, 2025
Posted by: Lynda G.
Hoping these filters help to cut down on a fine white dust that is everywhere in the house! The company I deal with only changes filters once a year. They have also changed filter style. Wish me luck. .
Written by a customer while visiting Filterbuy