manual P46:
Environmental Systems
Warm air for heating the cockpit and for defrosting the windshield is conducted from a port in the dome aft of the coolant radiator through a flexible duct to a point behind the pilot's seat. The air then passes to the cockpit hot air outlet valve at the left side in front of the pilot's seat. From the defroster valve, warm air is conducted to a distributor fitting, to which windshield defroster tubes are attached. The two valves are of the gate type. A pointer attached to the valve handle indicates the position of the gate.
Air for cooling and venting the cockpit is diverted by a scoop above the forward part of the radiator scoop and conducted through a flexible tube to a valve behind the pilot's seat. Two smaller flexible tubes attached to the valve conduct the cool air to the outlets located behind and on each side of the pilot's seat just below the canopy line. The valve is controlled by a handle on the floor in front of the right side of the pilot's seat.
Should we expect vapor or even rain drops on the windshield ?