AirDoctor 3500 Ultra HEPA Air Purifier Large Rooms Up to 1260 sq. ft. 2x/hour White

Room coverage of up to 638 sq. ft. 4 times per hour or 1274 sq. ft. 2 times per hour Auto mode adjusts filtration levels based on current air quality Whisper-jet fans operate 30% quieter than traditional air purifiers Four fan speeds allow for customizable purification from whisper quiet to boost Compatible only with UltraHEPA and Carbon VOC filters made by AirDoctor