Winix air purifiers feature multiple manual fan speed options that may be used at your discretion. Alternatively, you may use the 'auto mode' to reactively adjust all by itself, as needed.
These adjustable manual fan speeds range from 'sleep mode' (the quietest, ensuring lowest noise levels when sleeping), up to 'low', 'medium', 'high' & 'turbo' (Zero range only).
Higher fan speed levels are ideal when you want the air purifier to circulate maximum air, e.g. post cooking, vacuuming or pre or post meeting room appointments.