The Blast Mini Mk II Air Purifier is a high-powered yet compact HEPA air purifier effective for large spaces like schools, hospitals and offices, cleaning spaces up to 85sqm. Add a carbon filter to filter out dangerous chemicals including VOCs, formaldehyde and cigarette smells. Ideal for Offices, Bedroom, Living spaces, Saloons, Dining Halls with H13 HEPA Filter CADR(m³/h) (low – mid – high): 340 – 450 – 740 Rated Airflow: 1250cbm/hr (735cfm) Maximum Area: 85m² (915 sqft) Noise levels (low – mid – high) 36 – 43 – 49 HEPA lifespan: 3120 hours (13 months with 8 hours of daily use) Equivalent to how many Cannons? 4.3