Quote:
Originally Posted by The Yen Man
I have a hot water re-circulation pump, so I get hot water in about 2 seconds after I turn on the tap since the warm water is continuously recirculated in the system.
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That seems much less efficient then a water heater, you have all of the heat transfer from the pipes instead of much less surface area in an insulated tank. Also do you need some kind of pump to recirculate the water?