With my old machine (REMStar Plus M Series) when I pulled out the water chamber in the morning it was warm.
With the ResMed S9, and heated tubing, the bottom of the water chamber is ice cold in the morning. I have it set up in manual mode with heated tube at 80F and humidity setting at 4.
Is this something that I need to get looked at, or is this normal operation? It doesn't seem to use a lot of water either.