Customer reviews from filtrete.com
Filtrete - Allergen Defense 20" x 25" x 1" Pleated Air Filter, MERV 11 (9803-4) - Red
Average customer rating
4.7
(472 Reviews)
Rating breakdown 472 reviews
5 Stars
391
4 Stars
63
3 Stars
6
2 Stars
3
1 Star
9
96%of customers recommend this product.
(
429 out of
446)
Customer Reviews for Filtrete - Allergen Defense 20" x 25" x 1" Pleated Air Filter, MERV 11 (9803-4) - Red
Customer Rating
4
This is my regular filter.
on August 12, 2021
Posted by: Teritad
from SC
Gender:Female
I'm pretty satisfied with this filter, although I really need to change it every month. There is no way I could extend it to 3 months.
I would recommend this to a friend!
Written by a customer while visiting filtrete.com
Customer Rating
5
Great
on September 9, 2021
Posted by: BillyD
from Sardis, Ms
Gender:Male
I buy this one every time . My wife has allergies and this product helps her.
I would recommend this to a friend!
Written by a customer while visiting filtrete.com
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
1
Runs Slightly large and Doesn't Fit
on August 27, 2024
Posted by: DJM5
I cannot comment of how well the filter works but wanted to comment on the Fit. I purchased the 1085 Allergen Defense Air Filter in 14x14x1 , 14x30x1 and 20x30x1 sizes. None of them fit. I was able to squeeze the 14x14 sized filter by slightly bending one side but has to bend much more of the larger filters to force the fit. I previously had the basic Filtrete filters in the same sizes and they fit with no problem but I wanted to upgrade my filter. Unfortunately, the upgrades version is just slightly larger despite being the same sizes. I will return this product and either have to go with the basic filter or find a higher quality filter by a different brand .
Response from filtrete.comBy 3M-Filtrete, 3M-Filtrete Care Team, August 29, 2024
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
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
1
The size doesn’t fit.
on November 15, 2025
Posted by: Amthony
Run slightly bigger… doesn’t fit. I had to purchase brand. My disappointment is that I’m reading olds comments and reviews (about 2 years ago) and looks like the brand is not interested to fix this issue.
Response from filtrete.comBy 3M-Filtrete Care Team, 3M-Filtrete, November 18, 2025
Thank you for leaving your review. We are sorry to hear this and would not have expected the product to be as described. If you need any further assistance, please connect with us directly at 1-800-388-3458 Monday-Friday 8:00am-4:30pm CT.
Written by a customer while visiting filtrete.com