Classic 400 Series DualProtection Filter

Classic 400 Series Filter Performance

In our house I used 2 Series 400 filters, a dual protection filter in a master bedroom and a particulate filter in a family room. I found both filters effective in improving room air quality resulting in well controlled asthma while using only low levels of medication.

Quality Protection

The Classic 400 Series DualProtection Filter has been in our home for years now, and it does the job well. We particularly like how quiet it is on the lowest setting.

The beat air cleaner!!!