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Automatic Controls

This paper describes the various automatic control options available in modern buildings. It includes the various options available to the services engineer of control at a number of levels-time, temperature, and space-in order to provide suitable comfort conditions with energy economy, The possibilities described include overall heating system control, internal limiting of temperature, external compensator systems, timeswitches with various facilities, optimum-start controllers, thermostatic radiator valves, and building automation systems. K.M. Letherman