Customer reviews from Filterbuy
Filterbuy - 13x21.5x1 MERV 11 Pet & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (4-Pack) - Gold
Average customer rating
4.4
(7,007 Reviews)
Rating breakdown 7,007 reviews
5 Stars
5,174
4 Stars
754
3 Stars
439
2 Stars
245
1 Star
395
Customer Reviews for Filterbuy - 13x21.5x1 MERV 11 Pet & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (4-Pack) - Gold
Customer Rating
4
Good
on March 30, 2026
Posted by: Customer
My fault for not reading the specific measurements, the "4" isn't actually 4 inches. its like 3. 7 or something. Maybe I was born yesterday and this is normal for filter sizing, but it does not fit like the 20x20x4 Honeywell filter that my HVAC people put in when our furnace was replaced a few months ago.
Written by a customer while visiting Filterbuy
Customer Rating
5
We have used these for
on March 29, 2026
Posted by: Customer
We have used these for 2 years now with great results!!
Written by a customer while visiting Filterbuy
Customer Rating
5
Filterbuy
on March 29, 2026
Posted by: Customer
These filters are outstanding I change it out once a month when I remove them they're black 18x18x 1. I bought this home as they were building it in 2021. thats when I moved from CA to FL I saw your ads and been using them ever since.
Written by a customer while visiting Filterbuy
Customer Rating
5
good filters
on March 29, 2026
Posted by: Customer
These furnace filters seem much better than the last ones we bought. The filters we bought previously had no reinforcement and the cardboard bent when I tried to slide it in place. These filters have 2 types of reinforcement in them and slide in place easily with no bending. We're very pleased with the product.
Written by a customer while visiting Filterbuy
Customer Rating
5
Monthly subscription
on March 28, 2026
Posted by: Customer
I have been on my subscription for about 6 years now, and have even moved to a new home, and started it there. Very happy with the service.
Written by a customer while visiting Filterbuy
Customer Rating
5
Quality seems very good, I
on March 27, 2026
Posted by: Customer
Quality seems very good, I haven’t installed them as yet, but I know the are great.
Written by a customer while visiting Filterbuy
Customer Rating
5
Quality and the Best Price
on March 27, 2026
Posted by: Customer
I am never disappointed with Filterbuy 11 MERV products. I buy in bulk for all of my family and the price can't be beat!
Written by a customer while visiting Filterbuy
Customer Rating
5
Same great filter, repeat customer ×4 or 5?
on March 26, 2026
Posted by: Customer
I feel like im in The Stanley Parable Delux edition. .
I always order this filter. I always give it 5 stars. Why keep blowing up my mailbox begging for a Review? Obviously if im a repeat customer is love the product.
I always order this filter. I always give it 5 stars. Why keep blowing up my mailbox begging for a Review? Obviously if im a repeat customer is love the product.
Written by a customer while visiting Filterbuy