Heating and ventilation in cars

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Ventilation

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.

Ventilation in cars The door glass in picture left is lowered for ventilation. This same glass may be raised and set in the position shown in picture right. When the forward "wing" is thrown outward, it serves to draw out the air from the interior or throw it into the interior depending on the degree of opening. When the wing alone is opened slightly it serves to draw the air out and is thus a great aid in clearing fog from the inside of the windshield in cold weather.

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.

Cowl ventilator

The cowl ventilator is supplied as either single- or double-unit arrangement. Air coming over the hood is scooped into the car interior through the space provided when the ventilator is raised as shown left. Screens on these ventilators prevent dirt and insects entering the car. This particular ventilator provides a pan under the ventilator into which the breeze of air is first directed. This allows the moisture or dirt, if there is such present in the atmosphere, to be sifted out before the air enters the driver's compartment thus providing for cowl ventilation under any circumstances.

Some cowl ventilators lift at the rear, catching air forced down by impact with the windshield. This design helps to eliminate dirt and rain from the cooling air currents.

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.