Propane powervent waterheater, operates nearly the same as a modern furnace.. plugs into a standard wall outlet, draws very little current. I like to shower just before bed, and I hate listening to the waterheater run when hot water will not be needed until 6:00AM. Is there any real savings in putting a timer on the electrical (can use a heavy-duty grounded lamp timer) so the heater will not bother to run until morning? Could even do the same thing during the day, when no one is home. Mike.