HVAC 9 the air flows over the cold evaporator fins. This cold dehumidified air is then mixed with the hot air (if required) to attain the temperature selected by the occupant; the mixing control is done by the heater door opening. REAR AC In this vehicle a separate AC unit is installed for rear seat occupants. The refrigerant from the condenser is split into 2 paths, one to the front HVAC unit and other to the rear AC unit. The rear AC unit similar to front AC unit consisting of a TXV valve, an evaporator and a blower. It has ducts to the second and third row seats. NOTE The rear seat occupants only have a separate AC unit but no separate Heater unit. Rear AC unit is an auxiliary system, hence it cannot work when the front HVAC is turned OFF.
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