keith wrote:
He was claiming that the waste heat helped in the Winter. ...can't
have it both ways.

Someone in the thread was pointing out heat loss in pipes. Well, it's
doubled, at minimum, if the hot water is recirculated back to the
water heater. ...can't have it both ways.

The hot water doesn't get back to the heater. The pump turns off before that.
The hot water gets to the faucet.