Maybe in the real high end coaches but I have yet to see one that is.
My coach brochure said the tanks were heated also.
Do you know what I found the word 'heated' means?
They took the furnace duct work to the bedroom and divided it in half!!
One half of the duct goes to the bedroom and the other half goes into the bay. Voila! What they call "heated tanks". :R
1. If you choose to use space heaters instead of your furnace=frozen pipes.
2. The bedroom where you sleep where you want to be warm? Is cold because only half the duct is emitting heat into the room.
AND
3. Thermostat is in bedroom so the person sleeping in the bedroom cranks up the heat to stay warm and that in turn makes it 100 degrees in the front of the coach.
Yup. You need to check first just what they mean by heated tanks! :W