On Nov 29, 2:22 pm, wrote:
Harry K wrote:

... You are paying to dump cold water back into the heater to be reheated.
That has to cost more than the same water put down the drain.

No...

Nick

??? just that. No defense?

Bob does have a point as far as the "turn the pump on only when hot
water is wanted". Probably pretty much a wash as to cost.

If the reciculator runs full time, then you are paying to heat by
whatever amount all the space the pipe runs through 24/7. Yes, even
if the pipes are insulated there is a loss.

Harry K