I gave the review 5 stars because the filters filter out both bacteria and viruses. I could tell the difference in air quality within minutes of having them installed. I have used other name brands,which their highest rating did not filter out bacteria and viruses.
So far everything is great except that one of the filters that I ordered is the wrong size. Its my fault. I chose the wrong size. I got a 20x21x1 MERV 13 but I needed a 20x20x1 MERV 13 filter. Who do I talk to about a swap out to a different size?