A heating, ventilation, and air conditioning (HVAC) system for a vehicle. The HVAC system includes an HVAC case. The HVAC case has a first inlet and a second inlet. The first inlet is in receipt of airflow from a front blower. The second inlet is in receipt of airflow from a rear blower. A front foot outlet directs airflow towards the feet of occupants at a front of the vehicle. A rear foot outlet directs airflow from the rear blower towards a rear of the vehicle. A rear-to-front airflow control door is movable to direct airflow generated by the rear blower and heated by a heater core through the rear foot outlet, through the front foot outlet, or simultaneously through both the rear foot outlet and the front foot outlet.