I really wanted to purchase from this company due to its mission statement. Unfortunately 20x25x4 is lacking about 1" in height compared to the other two manufactures I had in my 2 air handlers... I had to rig something up to make them work but when I finish the 4 filters I purchased I can't do this again... I will have to go back to the major brand filters which are different sizes than these (but also marked 20x25x4).No complaints about the quality or price... for my a/c system (New house built in 2013-14) they just don't fit like the major brands.
I have had the first filter in for less than a month, hard to review at this time. Still have all the allergy symptoms, eyes, nose, etc. I love that they are a 1/2 inch below what the 20x24 says. A true 24 inch long filter sticks out of the front of my AC by about a 1/4 of an inch. This little bit makes your filters fit perfectly. If after the 2nd or 3rd filter, my allergy symptoms improve, you may have a long term customer, if not, well, we'll see.
I can't really rate yet as I haven't used.....I bought some to see if it would help my wife's alergies, but still am using the last one I put in before ordering
Great air filters. We had an electronic air cleaner that required regular cleaning. These do a great job of catching contaminants and we simply replace every 6 months.