Most of what matters in indoor air is invisible. The Core 300 uses a 3-stage filtration system to capture fine dust, pollen, smoke particles, and pet dander, while activated carbon helps reduce odors and common household fumes. It runs as quietly as 24 decibels, produces no ozone, and can filter the air in a 220 sq ft room up to 5x an hour. A simple, dependable place to start for cleaner air where you spend the most time.