Torrid 10 gallon horizontal electric water heater with heat exchanger loop. Model H-10 Heats from the engine or shore power 1500 watt, 120 volt, 12.5 amps Sitting vertical in the photos but brackets are for horizontal mounting Was installed in a boat which was never used - has never had water in it. New Vertical heater costs about US$600 (+ cost of heat exchanger loop) at http://torridwaterheaters.com/