Our low
pressure hot water heater
has been going for a little over a year now.
We've worked out a pretty
good system where I turn it on about an hour before dinner which gives
more than enough hot water for the dishes.
Makes me wonder how much
energy we've saved over this past year compared to a hot water heater going all the time?
We're in an off grid place in Oz, and have little electricity to spare. Thus to do our dishes in the winter I boil a kettle (well bring it to 80°C). I wonder whether that, or heating your electric water heater uses more energy.
Ps if I need more hot water or to shower, I light our wood cookstove, which has a boiler in back and heats a tank of hot water. In Summer, we have solar hot water panels - but they break if they freeze, so they get disconnected in the winter.