The Soehnle Airfresh Wash 500 air washer ensures consistently clean air. The high-quality, replaceable pre-filter, EPA filter, and activated carbon filter capture pollen, dust, bacteria, viruses, and ultrafine particles down to 0.3 µm. Even unpleasant odors and gases are filtered out of the air. To maintain high cleaning performance, the filter status indicator signals after approximately 1,000 hours of operation that the filter should be replaced. It can be quickly and easily removed and reinserted.