If there was a dehumidifier in the room you would have heard it. It makes more noise than the A/C. Also you would have had to remove the holding tank in order to empty it. If you didn't then it would have shut off because it was filled with water. The A/C is very cold but in my unit on the 5th floor on the Sonesta side the A/C does not pull the humidty out of the unit. Also I'm an owner as well and I don't think that has anything to do with the dehumidifier.