A:Answer If you want to use it as an AC , you have to drain every 1-2 hours. As for Honeywell response to this, they suggest if you don't want to drain it , you can enjoy their dehumidifier function to self evaporate and sit in 90 degree hear with no AC enjoying their $600 dehumidifier as the AC function will have to be turned off to turn on to dehumidifier function.