AbstractGet full access to this articleView all access options for this article.Get accessReferences1. Roots W. K. ‘Fundamentals of Temperature Control’, Academic Press, New York, U.S.A., 1969.2. Roots W. K. Woods J. T. ‘On-Off Control of Thermal Processes’. IEEE Trans. Industrial Electronics and Control Instrumentation, New York, U.S.A., to be published.