Customer reviews from Filterbuy
Filterbuy - 21x23.5x1 MERV 11 Pet & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (3-Pack) - Gold
Average customer rating
4.6
(3,949 Reviews)
Rating breakdown 3,949 reviews
5 Stars
3,135
4 Stars
393
3 Stars
198
2 Stars
89
1 Star
134
Customer Reviews for Filterbuy - 21x23.5x1 MERV 11 Pet & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (3-Pack) - Gold
Customer Rating
5
Refill standing order
on May 14, 2026
Posted by: Customer
I needed to replace the AC filter and the ease of getting the very same filter was a breeze!
*system remembers size, MERV. VERY pleased with the continued quality and promptness of Filter Buy. I'll be back!!
*system remembers size, MERV. VERY pleased with the continued quality and promptness of Filter Buy. I'll be back!!
Written by a customer while visiting Filterbuy
Customer Rating
5
Works great
on May 14, 2026
Posted by: Customer
You can tell the difference when you used them. Specially in Florida with all the pollen.
Written by a customer while visiting Filterbuy
Customer Rating
5
This is my third time
on May 13, 2026
Posted by: Customer
This is my third time using Filterbuy. Always quick and affordable.
Written by a customer while visiting Filterbuy
Customer Rating
5
Best Filters
on May 12, 2026
Posted by: Customer
I really like these filters. They work perfectly. I notice little dust in my house!
Written by a customer while visiting Filterbuy
Customer Rating
5
Having Pets
on May 10, 2026
Posted by: Customer
Having multiple family pets in my house, when I walk in the front door, I don't want to smell them as much as I love them. I use these filters to get ride of pet dander and smaller dust particle. Leaving the house smelling fresh and looking clean even between dustings.
Written by a customer while visiting Filterbuy
Customer Rating
4
A little hard to tell
on May 10, 2026
Posted by: Customer
A little hard to tell about the effectiveness of the filter after only having it in my system for 2 weeks. my previous filter had a lot more pleats (surface area) in it to collect contaminants.
Written by a customer while visiting Filterbuy
Customer Rating
5
Great filters
on May 9, 2026
Posted by: Customer
Filter Buy has furnished me with great filters for many years now, and I highly their filters and the fine reputation of the company.
Written by a customer while visiting Filterbuy
Customer Rating
2
No longer true to size
on May 9, 2026
Posted by: Customer
24" x 24" isn't true any more.
All past orders fit right but none of these do.
Written by a customer while visiting Filterbuy