Quote:
Originally Posted by retiredguy123
I think the point is that the water in the tank is already hot, but the tankless water heater needs to heat up the water.
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But, regardless of whatever type of water heater you have, the water in the line between the water heater and the tap is not heated. So that cold water has to be flushed out before the hot water arrives. And the tankless heats the water instantaneously as the water goes through. There is no holding tank.