relatively cool sorbent heat exchanger 173 and reactor 175 both include heat transfer sections through which a heat transfer fluid is calculated suitable heat transfer fluids include ethylene glycol water propylene glycol water or equivalent anti freeze compositions known in the art the heat transfer fluid exchanges heat with the sorbent in reactor 175 and the refrigerant in heat exchanger 173 an outside coil 172 exchanges heat or thermal energy with the ambient or atmosphere while the inside coil 171 selectively heats or cools the passenger compartment 170 each of the inside and outside coils also is provided with a fan or blower schematically illustrated which assists in heat exchange of the coils as previously noted a u201c reactor u201d may comprise a bank of two or more reactors the apparatus of the system illustrated in fig4 also includes several control valves such as ganged 4 way valves 181 and 182 and recirculation pumps 176 and 177 the valves and pumps provide the circulation and direction of the heat transfer fluid via the heat transfer fluid piping 174 which communicates with the reactor 175 and evaporator 173 and the inside and outside coils 172 and 171 respectively in the embodiment shown sorbent in reactor 173 is heated by an electric resistive heater element 190 powered by the vehicle alternator as described in the embodiment shown in fig2 other means for heating the reactor for driving the desorption reaction include heating the complex compound by direct firing of the sorber tubes or using heat from hot gases of combustion from a liquid or gas fueled burner alternatively the sorbent.