Customer reviews from Filterbuy
Filterbuy - 12x20x4 MERV 11 Pet & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (12-Pack) - Gold
Average customer rating
4
(1,144 Reviews)
Rating breakdown 1,144 reviews
5 Stars
660
4 Stars
148
3 Stars
119
2 Stars
91
1 Star
126
Customer Reviews for Filterbuy - 12x20x4 MERV 11 Pet & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (12-Pack) - Gold
Customer Rating
1
The size of substandard and
on August 18, 2026
Posted by: Customer
The size of substandard and does not meet the requirements of my system although you said they would won't be ordering any more filters from you
Written by a customer while visiting Filterbuy
Customer Rating
4
One size doesn’t fit all
on August 14, 2026
Posted by: Customer
Why is their no standard sizing for these things? Different brands have different sizes, so fit better than others. Filterbuy is a bit smaller than comparable Filtrete of the same size, they all have their interpretation of 20x25x4.
These may be great filters, and I knew the actual size before I bought, just don’t understand why there isn’t a standard. Lot of space around these compared to my filtrete.
Written by a customer while visiting Filterbuy
Customer Rating
5
Good filter
on August 8, 2026
Posted by: Customer
I use these filters for 3 years and they work great
Written by a customer while visiting Filterbuy
Customer Rating
1
Filters did not fit returned
on July 31, 2026
Posted by: Customer
Filters did not fit returned and still waiting on replacements
Written by a customer while visiting Filterbuy
Customer Rating
5
Easy ordering
on July 29, 2026
Posted by: Customer
Love how you feed us to order and how quickly the product comes. Good quality Filters never disappointed. Thanks.
Written by a customer while visiting Filterbuy
Customer Rating
3
Size is small
on July 29, 2026
Posted by: Customer
It fits barley in the furnace. All other filters I buy fits tightly.
Written by a customer while visiting Filterbuy
Customer Rating
4
Quick service
on July 29, 2026
Posted by: Customer
We received our filter quickly. The only downside is that It's thinner that the one that is in our furnace now and it's upsetting my husband to no end. I told him the dimensions are right but he is unhappy.
Written by a customer while visiting Filterbuy
Customer Rating
5
Wonderful i could not ask
on July 25, 2026
Posted by: Customer
Wonderful i could not ask for better filters thank you
Written by a customer while visiting Filterbuy