Air conditioning, aka HVAC&R (heating, ventilating, air ventilating, air conditioning, and refrigeration), was developed in the 1900s, and now contributes to one sixth of US energy usage, to the depletion of the ozone layer, and to the reality of global warming. This handbook (updated from the 1994 edition) includes developments in HVAC&R as they pertain to the design of energy-efficient systems. These relate to improvements in indoor air quality, in microprocessor-based energy management and control systems for medium-size or large projects with generic controls in graphical display, monitoring, trending, totalization and numerous specific functional controls; and in updated technology, such as artificial intelligence, BACnet, computational fluid dynamics, reciprocating compressors, etc. Wang has over 50 years experience in the field, was senior lecturer at Hong Kong Polytechnic for 12 years, and now lives in the US. Annotation c. Book News, Inc., Portland, OR (booknews.com)