Improve your indoor air quality with the largest and most advanced air purifier from Hunter. The Hunter HP980 AirMax is the perfect air purifier for large spaces such as a large home, classroom, office, church, or even an industrial environment! The HP980 AirMax can clean the air in a 640 sq ft room 4.8 times each hour or 115 times each day. This large air purifier features a powerful internal fan that pulls air from 360-degrees into the air purifier before the air enters a 3-stage filtration process.