I'm considering getting an evaporative humidifier for my super-dry Northeast house, but I'm wondering if the evaporation cools off the room and is going to add to my heating bill.
It seems like evaporative humidifier work exactly the same was as evaporative air conditioners — i.e. blowing dry air across water to cause evaporation, thus transferring the heat of the air into water vapor's latent heat.
Am I wrong about the thermodynamics? Or is the effect small enough that it doesn't make much difference?