Combining ease of use with an design, this unique air purifier delivers cleaner, healthier indoor air for rooms measuring approximating 20 by 15 feet. Its front access control knob allows for selecting from two speeds--HEPA silent or Max airflow. Even on "Max airflow" the air purifier delivers whisper quiet operation at just 49 db. The unit also provides an ultra efficient EC fan motor and HEPASilent technology, which uses electrostatic and mechanical filtration to quickly and quietly capture 99.97 percent of particles down to 0.1 micron in size, including allergens such as pollen grains, dust mites, mold spores and pet-dander particles. Type: Cleaning Kits