Thermostatic Air Cleaner: Operation

When incoming air temperature, as sensed by bimetal, is below a predetermined temperature, air control valve will be up (hot air position). When temperature has reached a predetermined temperature, control valve will be down (cold air position). Between predetermined temperatures, control valve will be positioned to blend both hot and cold air to moderate temperatures reaching carburetor. Through this method, air temperature being used by carburetor is kept nearly constant.