Kuuma 11 Gallon Hot Water Heater, 120V with Front Heat Exchanger Two versions of the 11-gallon heater both having a front heat exchanger, with Side Mounting Tabs or Front & Rear Mounting Tabs. This 120V Corrosion-resistant water heater has an aluminum tank and casing. Uses shore power when plugged in at the dock, and engine heat when available. Equipped with 5/8" hose barbs for the optional heat exchanger connection, and 1/2" NPT threaded ports for domestic water allowing easy installation. Complete with ignition-protected controls. Specifications;