 The Nash HVAC system was designed by Nils Eric Wahlberg and it continues to be the basis for use in modern automobiles.Nash included the first automatic temperature control for the airside of the heating system with the thermostat sensing the temperatures of the incoming outside air, the heater's discharge, and interior of the car; so that a change in any of these three air temperatures resulted an automatic adjustment to maintain passenger comfort.Nash's Conditioned Air System heater was now marketed as the "Weather Eye" and consumer sales literature explained that the thermostat's "mechanical eye" watched the weather, hence the name.