Hot water is heated in several ways. In port in summer, the water is heated by standard electrical elements operating off the alternating current (AC) system. In winter, it is heated by the water jacket on the diesel oven. If the oven is not in use, and there is no other source of heat, the hot water tank defaults to the electrical elements.
Use an anti-scald, balanced-pressure shower valve (not a tempering valve!) on the showers to regulate the water to 120 Fahrenheit (F°F) 48.8 Celsius (C°C). This will avoid scalding people, and reduce water consumption. Bathers will be able to mix the water faster to a comfortable temperature.
=== Refrigeration ===