... m2 4. 5 levels of wind speed LY-868A Floor Air Purifier:CADR: 300CFM (510m³/h)Applicable Area: 60m²Rated Voltage: AC120V ... under auto mode.3,5 levels of wind speed, applicable for different room area and environment4,Noise 32db at lowest speed ... motor with variable frequency,Energy Star >5.09,Special duct design by professional company, low noise ,strong wind blow 10,Using ...