It's important that the water is evaporated by energy taken from the room. Adding an energy source to evaporate the water kinda eliminates the point.
The water would be evaporated by the excess heat in the room. The question would be how to remove the water from the air without putting heat back into the room. A dehumidifier will condense water, so that releases the energy back into the room. I suppose I could vent the air out of the room onto the landing, where I can run the dehumidifier. That takes the heat into another room, which has better ventilation.