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 AirMax Industrial Strength Air Purifier utilizes built-in VOC and Particle sensors so the machine can automatically adjust the fan speed based on the current air quality. 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. The air first passes through an EcoSilver® pre-filter, where larger airborne particles such as pet hair and dander are trapped. The True HEPA filter captures up to 99.97% of the smaller particles that make it past the pre-filter, as small as 0.3 microns in size. Finally, the particles pass through granular carbon to reduce household odors from cooking, cleaning, smoking, and pets. The clean air then enters back into your home for a smarter, cleaner environment.