Customer reviews from filtrete.com
3M - Filtrete 20x20x4 AC Furnace Air Filter, MPR 1000, MERV 11, Fits Honeywell, Allergen Defense, Electrostatic Air Cleaning
Average customer rating
4.7
(350 Reviews)
Rating breakdown 350 reviews
5 Stars
273
4 Stars
67
3 Stars
2
2 Stars
3
1 Star
5
98%of customers recommend this product.
(
328 out of
336)
Customer Reviews for 3M - Filtrete 20x20x4 AC Furnace Air Filter, MPR 1000, MERV 11, Fits Honeywell, Allergen Defense, Electrostatic Air Cleaning
Customer Rating
5
My trusty filter
on March 18, 2023
Posted by: DG LuLu
I have been using this particular brand and type of furnace filter for decades! It seems to do a fabulous job of catching the gunk out of the air that comes through the furnace system. Two thumbs up from me!
Written by a customer while visiting filtrete.com
Customer Rating
5
Prepare to be Amazed!
on January 12, 2024
Posted by: permethian
I purchased this filter a few days ago. Before installing this filter, my husband was sneezing very often everyday. We were so amazed the first day, he did not sneeze at all; everyday since, it has been the same. I know a person would have a hard time believing it could work so well and so fast, but it is absolutely true. Thank you for making such a wonderfully made product.
Written by a customer while visiting filtrete.com
Customer Rating
5
Great filter
on January 19, 2024
Posted by: MeMyselfandI
Help minimize dust in the house and provides relief from seasonal allergies while indoors.
Written by a customer while visiting filtrete.com
Customer Rating
5
on September 9, 2024
Posted by: Anonymous
It is a great product that keeps the air clean and no dust is in the air and on furniture
Written by a customer while visiting filtrete.com
Customer Rating
2
Too restrictive.
on September 29, 2025
Posted by: Herman the German
Too restrictive does not allow enough air flow. My 5 ton unit is sized correctly for my home. My return is 1024 sq in Unit struggled to cool with these in higher temperatures. Unit is less then a year old as soon as we put a less restrictive filter in the air flow was better and unit was quieter.
Response from filtrete.comBy 3M-Filtrete Care Team, 3M-Filtrete, September 30, 2025
Hello, thank you for taking the time to leave your review. Your experience is not what we would expect, and we would appreciate the opportunity to discuss this with you and gather further details. Please connect with our team at 1-800-388-3458 Mo-Fri 8am-4:30pm CT. Thanks again, and we look forward to your call.
Written by a customer while visiting filtrete.com
Customer Rating
5
Best purchase ever they are a 9
on October 24, 2025
Posted by: Mymy69
I try to always run the Filtrete 1000 Allergen Defense. It is a true life savor.
Written by a customer while visiting filtrete.com