Heating, Ventilation and Air-Conditioning(HVAC) systems are omnipresent in modern buildings. This book is an introduction for all those involved in the specification, design, manufacture, installation, operation or maintainance of these systems. It is developed jointly with the ASHRAE Learning Institute, the leading and recognised technical experts in the industry. This Inch-Pound edition is primarily for use in US markets. An SI version is also available on ISBN 0123739985. The book explains: the objectives to be achieved by a system in terms of environmental control; the description of a system - including primary equipment, means of distribution, space and load determination, and operating strategy; the basic function of components that form HVAC systems; the layout and functioning of common HVAC systems, including all-air systems, air-water systems, and all-water systems; the strategies for operating systems and their basic means of control; and, identifying the most suitable type of system for different types of application. Air-conditioning is a major industry and growing.; It shows how systems operate and how to select, design and operate them efficiently to minimise installation cost and ongoing energy cost. It is endorsed by, and developed with ASHRAE, the leading trade body and recognised technical experts. It provides a thorough introduction to how HVAC systems function in controlling temperature, air quality, and air circulation in a controlled space.