Title: this really works
Product review: This really works. The auto mode is fantastic. Comes on as needed. To put it delicately....when I or my dogs pass gas within seconds the auto mode kicks in a goes to a higher speed. If I come up from my basement, it detects whatever I brought up with me and revs up. It is normally quiet and usually runs at low speed but I am amazed at the sensitivity to what is in the air and with three dogs it does the job. Filters are no problem to clean. I intend to buy another for my bed room since it sits over a crawl space.
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