hot water on Demand

[Kamper]

Originally Posted by Formula260SS

Doesn't the heater need to turn on and off to keep the loop hot? Wouldn't that defeat the purpose of saving energy? We are still talking on demand systems right?

With the push-button system the water only circulates when you want it to. The on-demand saves energy and the circulator saves water.

[TheProfessor]

Originally Posted by Kamper

With the push-button system the water only circulates when you want it to. The on-demand saves energy and the circulator saves water.

So you have to push a button on the circulator?
Where is the button?

If the shower is at the other end of house, there is cold water in the pipe. Pushing a button some place still has to heat up that cold water in pipe.
So apparently one is still using fuel to heat up the cold water in pipe.
6 or one and a half dozen of the other.

But let the engineers here explain all.