(Manufacturer # 403 ) 365 sq. ft coverage For effective purifying of large rooms. Removes impurities from the air Certified efficiency 99.97% for particles down to 0.1 microns such as dust, pollen, bacteria, virus, pet dander, mold spores and other airborne particles. Traps particles with mechanical and electrostatic filters, creating an open airflow system that remains near silent while 3 stage progressive filter It?s like having three filters in one capturing large particles at the first layer and small particles, including bacteria, at the second and third layers. Exhaust filter design resists clogging for continuous filtration at peak performance levels.Exceeds minimum energy efficiency guidelines. Meets strict efficiency guidelines ensuring a high volume of clean, filtered air is delivered. Made of galvanized steel for a strong, durable design. Alerts you when the filter needs to be replaced every 6months. Up To 500 Sq. Ft.