There are, or used to be, Bosch tankless water heaters which used a small turbin...

		alvah on Jan 17, 2023 \| parent \| context \| favorite \| on: Heat pumps of the 1800s are becoming the technolog... There are, or used to be, Bosch tankless water heaters which used a small turbine connected to a piezo-electric igniter, no external power source required ever.