I know its been a couple years and maybe someone already told you or you know already, but if you have a humidifier in your room, it will cause your air purifier to run on high. Air purifiers and humidifiers don’t mix. At night I turn my purifier to sleep mode. It sits in the living room and my humidifier is in my bedroom. If I keep the purifier on at night, it detects the humidity and starts to ramp up.