I wish I had bought these filters a long time ago. We had a serious dust problem due to the carpet and the large dog. I was able to wipe the dust off and after 5 minutes it didn't look like I had touched it. If I didn't dust for days, it looked like we lived on a dirt road and closed the windows (it was that bad). After much thought and research on how to try the highly rated Merv filter, I settled on the Merv 8 filter. After researching, comparing prices and reviews, I decided on these filters and I am very glad I did . My dust problem has been reduced by 90% or more. I was concerned about restricted airflow, but that wasn't an issue. Now I have a problem with dust, about once a week I lightly clean the filter with a vacuum cleaner. Also, these filters have an overall size of 20 x 20 inches as opposed to some that claim 20 x 20 and are only 19 1/2 x 19 1/2. I will definitely buy these filters again!
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