Customer reviews from Filterbuy
Filterbuy - 18x21x1 MERV 11 Pet & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (6-Pack) - Gold
Average customer rating
4.6
(3,905 Reviews)
Rating breakdown 3,905 reviews
5 Stars
3,098
4 Stars
390
3 Stars
196
2 Stars
88
1 Star
133
Customer Reviews for Filterbuy - 18x21x1 MERV 11 Pet & Allergy Defense, Electrostatic Pleated HVAC AC Furnace Air Filters Replacement (6-Pack) - Gold
Customer Rating
3
12*30*1 MERV 11 Pleated Air Filter
on September 12, 2025
Posted by: Anonymous
Product was slightly too big and had to modified to fit in the opening, not a complete seal but at least got it to fit in my opening.
Written by a customer while visiting Filterbuy
Customer Rating
5
bought 14 x 20 and
on September 10, 2025
Posted by: Anonymous
bought 14 x 20 and 16 x 25 just installed will see in 3 months
Written by a customer while visiting Filterbuy
Customer Rating
5
Great fit
on September 10, 2025
Posted by: Anonymous
I really like these filters. This brand is the only type that fits in my HVAC unit.
Written by a customer while visiting Filterbuy
Customer Rating
5
Great service; filters look super.
on September 10, 2025
Posted by: Irmgard H.
Great service; filters look super. Assume they will work very well!
Written by a customer while visiting Filterbuy
Customer Rating
5
Very well made product. We
on September 9, 2025
Posted by: Anonymous
Very well made product. We miss calculated the size and therefore could not use but the quality is top notch.
Written by a customer while visiting Filterbuy
Customer Rating
4
MERV 11 Custom Filter
on September 7, 2025
Posted by: Anonymous
I just put one in - looks to be ok, but have the following constructive criticism. 1. These are custom filters, and would be good to cover the old filter size from which they are made to reduce confusion. (see photo) 2. Because they were cut down, the air flow directional indicator was missing, and it might be good to put that on the new size sticker, or somewhere.3. There was no designated place to write the install date - might include that.4. The filters were a little bent, but appeared ok, because of damage to the packaging. (see photo) I'm happy to be able to get the proper size filter from your company, and hope they work well. Been having to get by with "incorrect size" until I discovered Filterbuy.
Written by a customer while visiting Filterbuy
Customer Rating
5
I needed this odd size. Air filter.
on September 6, 2025
Posted by: Anonymous
They had them in stock, and they fit perfect. I will definitely reorder. Thank you. By the way, they came extremely fast.
Written by a customer while visiting Filterbuy
Customer Rating
5
Havent used them yet. Just
on September 6, 2025
Posted by: Peggy R.
Havent used them yet. Just put in today but ac season I think is done. Im expecting them to be a 5 star
Written by a customer while visiting Filterbuy