CARNIVAL has separate front and rear temperature zones, meaning you can have full air-con going up front and full heating in the rear, or vice-versa. Rear settings can be over-ridden by the driver if required. Carnival has two separate ventilation ducts for the system: cooler air is channelled through the roof vents, while warm air is channelled through the floor vents. Rear fan controls are located above the middle-left seat.