A heating system for heating a tanker-trailer, including a housing, a fuel tank, a heating unit, fuel lines connecting the fuel tank to the heating unit, hot and cold water lines, connected at one end to the heating unit and at their other end to the tanker-trailer, and a control apparatus for controlling the flow of fuel from the fuel tank to the heating unit, water flow to and from the tanker-trailer, and the temperature of the water.
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