I have been using this in my Kenmore Air Cleaner for many years and have never looked back. It just gets the job done...Well!
Our first experience with atomic filters has been a good one. Our filter arrived on time and works great.
I have been using the Whirlpool air purifiers for many years. Yes same machines have been in operation for about 9 years,running constantly. In my opinion only the original Whirlpool filters are the most effective replacements. They are quieter and seem to be more efficient than knock-offs. I have only tried two "compatible" filters during those years, and found both to be louder due to the air flow passing through the cells, and the looser fit. I stay with the original Whirlpool filters. More expensive, but it's only a yearly purchase. Definitely recommend the true Whirlpool filter for the Whirlpool air purifier.