Bosch Thermotechnology designed the Tronic 3000 electric tankless water heater for point-of-use installations in small commercial or residential structures. With a 99% thermal efficiency, the water heater reduces the need for piping and gas line installations. Measuring just 12-1/4" by 6-1/2" by 3", the Tronic 3000 fits under bathroom and kitchen sinks. It uses a copper heat exchanger with copper-sheathed heating elements and is available in five models that use between 3.4kW and 12kW.