Cost is good however I keep getting vibration sounds. I have purchased these filters for years and it seems that every batch vibrate. I went from 13's to 11's im thinking about going down to 8's I purchased the 14x14x1 and 20x20x1. I really don't want to because I love the filters take out so much. Which effects my health. Or I will try a different company.
These filters do not fit correctly in my air handler. They are slightly smaller than the brand name filters I have been using, and they do not seal the air path in the air handler. I bought two different sizes for two different air handlers and both are slightly too small.
Although, I am happy filters are made in USA; however the actual width is an inch smaller than the advertised. I hope company will consider closing the size gap.