21x23x1 Pollen and Dust Control Pleated Replacement AC/Furnace Air Filter, MERV 8, (Pack of 4)

The filter helps my ac unit . I change it often because my unit is 15 years old.

I had a hard to find( locally)size filter and I found these at a reasonable price. They fit and work great.

Priced right works well.

It has always been difficult for me to find this slightly off size of filter for my AC unit. At least, it has been difficult for me to find these exact size/dimensions in my local hardware stores. I have had to use a slightly different sized filter that either was too short or too long, but still helped do the job. So, I was quite delighted when I saw these filters in the right dimensions on Amazon. I ordered them and they arrived without any trouble. They fit my AC system perfectly and worked quite well. I have gone through my first order and have reordered to continue to use these and get my family through the nice hot summers.

I've been getting my filters from another company and they never had the same size each time I received them. This is my first time using "enviroflow, and I'm impressed already. Perfect fit!! Made me very happy!! Thank you,Roberto Medina

Much better quality than expected at this price point. Thank you!! Fits my odd sized RUUD heat pump perfectly

These are good. Maybe a little flimsy compared to what I expected.

I was told to buy filters with a MERV rating from 8-11. These filters are great and work well. Although they say they are good for 90 days, I change them every 60 days