A single boiler heat exchanger is required using a single pressure vessel with over
pressurization devices. This heater unit is electrically powered and capable of
heating seawater and freshwater with a flow of 12gpm with an adjustable
inlet pressure from 0 – 15psi, and the unit has a temperature range of 72°F to 137°F
with plus +/- 20°F (30°c to 66°c with +/- 2°c) control. A cat pump is incorporated
within the skid to boost this hot water supply to the divers at 450 psi (31 bars). The
hot water unit incorporates the following: