Thermostatic Air Cleaner: Operation

When incoming air temperature, as sensed by bimetal, is below predetermined temperature, air control valve will be up, in hot air only position. When temperature has reached a higher predetermined temperature, control valve will be down, in cold air only position. At temperatures between these, 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.