Customer reviews from Filterbuy
Filterbuy - 20x25x4 MERV 13 Smoke & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (4-Pack) - Blue
Average customer rating
4.1
(1,163 Reviews)
Rating breakdown 1,163 reviews
5 Stars
723
4 Stars
109
3 Stars
127
2 Stars
89
1 Star
115
Customer Reviews for Filterbuy - 20x25x4 MERV 13 Smoke & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (4-Pack) - Blue
Customer Rating
2
Undersized.
on November 11, 2026
Posted by: Customer
The filters were sturdy. However, they were smaller than the stated 16x25x4. Small enough that I had to add a cardboard "shim" to ensure a snug fit. I bought two, and now I regret it.
Written by a customer while visiting Filterbuy
Customer Rating
5
High Quality
on October 28, 2026
Posted by: Customer
I have been very pleased with the quality and performance of these filters. Will buy again on auto ship!
Written by a customer while visiting Filterbuy
Customer Rating
5
One filter was smashed a
on October 28, 2026
Posted by: Customer
One filter was smashed a little but I was able to straighten it out.
Written by a customer while visiting Filterbuy
Customer Rating
5
Great price on filters when
on October 22, 2026
Posted by: Customer
Great price on filters when I bought in bulk. I will use them over the course of 15-18 months. So far, I've been very happy with the purchase.
Written by a customer while visiting Filterbuy
Customer Rating
5
Very happy!
on October 15, 2026
Posted by: Customer
We get a very good price from Filter Buy and we very glad that the filters are individually wrapped since this is a year’s worth of filters for us. Thank you!
Written by a customer while visiting Filterbuy
Customer Rating
5
Two heat pump air filters every six months
on October 5, 2026
Posted by: Customer
Always on time and correct sized filters. One is custom and the other standard.
I attribute the long life of our smaller heat pump to frequent changes of MERV 13 air filters!!
Written by a customer while visiting Filterbuy
Customer Rating
5
Thank you for your time
on October 5, 2026
Posted by: Customer
Thank you for your time and efforts to get my new filters to me on time. You are a fabulous company and I wish there was more people out there like you. Have a lovely day.
Written by a customer while visiting Filterbuy
Customer Rating
5
Excellent filters, fairly priced with
on October 2, 2026
Posted by: Customer
Excellent filters, fairly priced with solid fulfillment.
Written by a customer while visiting Filterbuy