Customer reviews from Filterbuy
Filterbuy - 20x34x4 MERV 13 Smoke & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (4-Pack) - Blue
Average customer rating
4.1
(1,160 Reviews)
Rating breakdown 1,160 reviews
5 Stars
721
4 Stars
109
3 Stars
127
2 Stars
88
1 Star
115
Customer Reviews for Filterbuy - 20x34x4 MERV 13 Smoke & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (4-Pack) - Blue
Customer Rating
5
Filters for furnace
on February 7, 2026
Posted by: Anonymous
Great product, got in three days. Very happy with filterbuy. -----I tell others about you. do not know if they bought filters from you or not. -----GREAT COMPANY
Written by a customer while visiting Filterbuy
Customer Rating
5
25x20x4" filters
on February 7, 2026
Posted by: Anonymous
I am a repeat customer. The filters are great. i have pets, and the merv 13 seems to do a good job of picking up all the allergens.
Written by a customer while visiting Filterbuy
Customer Rating
5
Excellent price
on February 7, 2026
Posted by: Anonymous
Excellent quality and price. Perfect fit. I'll never buy from anywhere else again. Received my order in 2 days.
Written by a customer while visiting Filterbuy
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