This MTN Gearsmith Air Purifier (HE-221) reproduces the natural environment outdoors. It is not designed to create an artificial fresh environment, but rather make the indoor air purified as natural clean air through circulated purification, disinfection and sterilization to increase anion and ozone. Generation pulsate: 20KV negative IONOzone output: 0-360 mg per hour. Voltage: 100-120V/50-60Hz. ION output: ≥5 x 106cm3. Fan Speed: 1500-3000 RPM. Air Volumn: 106 CFM (Max). Applicable area: 100m2 (1076 Sq Ft). Sound Level (DB): Low35/Med45/High52. Power Consumption: 35W.