billskip
Well-known member
About 35yrs ago this "instant hw" system was in some new build housing development's, a return hw pipe with pump, easily isolated.On the flip side, you’re radiating heat from the water constantly, you need stupendous insulation on all your HW pipework. Works best on high occupancy structures, where hot water is frequently drawn. That's a ‘don’t try this at home, folks’. Unless you have 13 children. On a boat, yes it saves water, but you’d be burning 20% more to heat it. Thank the Lord for calorifiers.
many changed to 7kw electric instant hw
htrs furthest from supply.
Yes it saves water on a boat, but it's the necessity to be comfortable that's important.