Intelligent Hybrid Air Purifier Intelligent Hybrid Air Purifier with 4-level Speed Selection and Greater than 150 CFM Key Specifications/Special Features: Multistage cleaning system uses pre-filter Ionizer plus electro-static- precipitation (ESP) filter, i.e. collection blade assembly; active oxygen; oxygen plus (O2 Plus) filter; cold-catalyst-oxidation (CCO) filter; and negative ion generator to clean your air Lifetime ESP filter never needs replacing Variable speed control adjusts speed to any cleaning level Three powerful commercial grade fans deliver superior cleaning performance Silence technology for quiet cleaning 24 hours a day Filter: pre-filter/ESP/O2 plus/PCO Negative ions output: >1,000,000 ions/cm3 Speed selection: variable speed control Auto-timer: 1/2/4/8 Hours CFM (ft3/min): >150 (highest speed) Recommended area: 38m2/414 feet2 Input voltage: 100 to 240V AC, 50/60Hz Power consumption: 29 watts (super speed)