This book covers HVAC and refrigeration system concepts and equipment, with emphasis on practical instruction in procedures and techniques for the installation, maintenance and repair of these systems. Particular attention is paid to widely applied, modern equipment and systems. Specific chapters on psychrometrics, microprocessor control systems and electronic ignition heating systems are included. The four sections of the book correspond to the typical course sequence of a classroom-laboratory approach. Parts one and two introduce the student to specifics of refrigeration and heating, such as: compressors; condensers and receivers; metering devices; refrigerants, oils and pipings; gas- and oil-fired furnaces; steam piping; venting; and electric and solar heating. Sections three and four present particulars of airside systems and electricity for HVAC applications, including: airflow and pressure; air distribution; load calculations; electrical devices; power wiring; and electrical circuits. Practical hints, as well as data on specific pressures and temperatures, pneumatic controls and troubleshooting approaches, make this text unique.