The fields of heat transfer and air-conditioning are so wide and diversified that an orderly presentation of scientific facts are essential for effective teaching of these subjects. In our teaching we should place emphasis not only to transmission of the knowledge but also to laying of a strong foundation on which further knowledge can readily be accumulated and the acquired knowledge can be fully utilized for useful purposes. This book although based of many crosses of heat transfer and thermal engineering and air conditioning and by providing a large number of fully worked out illustrative examples a large number of problems at the end of each chapter summary tables for ready reference. Improved heat transfer charts and correlations and comprehensive physical property tables to help to increase its usefulness in practical applications