Shark BreatheClear™ with NeverChange™ filtration Air Purifier cleans large rooms up to 750 sq. ft.* No other air purifier senses more* to react faster—with zero filter changes for up to 6 years with Shark NeverChange. Advanced sensors scan the air 3,600x per hour and auto-adjust power. HEPA-exceeding filtration captures 99.98%† of particles at every speed for a healthier home.