The Breathesmart Fit50 is the best! I suffer from allergies and asthma. The purifier significantly reduces the allergens in the air. I love how it automatically adjusts to the changes in air quality. The Fit50 has two air filters. The first one is the Pre-Filter which can be washed or vacuumed.
I believe this is a significant change which will help to maintain the purifier's performance. I keep mine in the bedroom. It's so quiet I can't even tell it's on, especially when I turn the lights of the unit off. The Breathesmart Fit50 does a great job and the air is so much cleaner!
I would highly recommend it to anyone who suffers from allergies, has pets or is concerned about mold in their home.