November Which 2012

[logixx]

Yes, it depends on one's individual installation. All the houses I lived in had recirc pumps and a big water storage tank so hot water was always plentiful. My washer is in the basement, which is excluded from the circulation circuit. Still, it only takes two to five liters for the hot water to come through - if I don't purge the line. The dishwasher is on cold water as it needs (or prefers) cold water for the condensation drying cycle. But even with cold water coming in, the dishwasher takes it to steaming hot within ten minutes.

 

[Iowegian]

@retro-man:

I would estimate that the percentage of the U.S. population that has domestic hot water recirc is almost zero.

If you have a hot water heating system where the domestic hot water comes from the heating boiler, then the efficiency penalty from adding a recirc pump to the DHW system is small, since the system is really inefficient in the first place.

But a bunch of other people don't have that kind of system.