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Vehicles with a large cabin volume incorporate two HVAC units to provide comfort to the front and rear cabin. Each HVAC unit can generate independent airflow volume, temperature, and airflow direction. A new HVAC unit was developed to achieve the performance and functionality of two HVAC units. A unique HVAC construction was used to achieve independent front and rear airflow volume, temperature, and airflow direction distribution. This integrated front and rear HVAC unit provides additional packaging space for other vehicle components and reduces the overall number of HVAC system components.