Formerly the adjustable windshield and the side windows which could be raised or lowered afforded the ventilation. In some later cars the windshield is rigid and may not be opened for ventilation. In other instances the side windows are seldom lowered for ventilation. In some cases the rear window glass is adjustable for ventilation. Many devices are in use in connection with the glass of the car for proper ventilation.
When it is opened fully it serves to literally scoop in great quantities of air for cooling drafts in hot weather. Many variations of these arrangements are designed to afford comfort to the car occupants by means of "individual" ventilation affording personal satisfaction under any and all conditions of weather.
Proper car ventilation is an important health consideration, and under certain circumstances, becomes a vital matter. For instance, in a car in which great quantities of carbon-monoxide gas find their way into the interior of the car, ventilation means the safety and well-being of the passengers of the car. If the car exhaust is finding its way into the driving compartment, it is advisable to play safe and use the ventilating system until the trouble may be eliminated.
Car heating and ventilating
Fresh air enters the air conduit through the funnel just back of the radiator grille and is conducted to the heater at the front of the car, from which point it is blown upward against the windshield for defrosting. Water from the radiator circulates through this heater, also through the under-the-seat heater, from which point heated air is blown to both the forward and rear compartments of the car.
Nash air conditioner
The control is through the "Weather Eye," which is extremely sensitive to outside weather changes, and acts to balance the inside weather against outside changes. An automatic heat-control unit, provided with a supplementary hand control, works in conjunction with a balanced water-control valve to maintain the desired temperature.
Air entering the open cowl ventilator is filtered and, in passing over the heater core, picks up heat which is discharged downward to the car 'interior. When the windows are closed, this air tends to build up a slight pressure which causes the stale air to be forced out through the crevices at the doors, foot-pedal opening, and windows. The defroster is controlled by the left-hand knob, which may be operated to divert all of the air to the windshield, discharging through the two nozzles shown. In the summertime, when dust and insects are encountered, the device may be turned to the cold position, serving as an air-intake filter, and thus supply fresh, clean air to the car.