I bought the filters based on good reviews. My filters arrived in perfect condition, unfortunately they don't work for me or my family. I used the first one in early January. I had to replace it next week because it turned black! There was no dust on the filter, but it was completely black as charcoal. I got it on 01/19. exchanged and only exchanged today on 02/21/20, this time it is only gray but no dust. It just doesn't do the job of filtering the air. I don't open windows so there isn't a lot of dust in my house, but I've noticed an increase in dust around the house since using this product. I found dust on my AC duct to the right of the return, so the filter is definitely NOT filtering or cleaning my air.
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