This comprehensive reference addresses the diverse topics that form the backbone of energy efficiency in a timesaving dictionary format. Entries include a broad range of important topics, covering such areas as advanced power system infrastructure, power options and configurations, systems of generator backup, redundancy, capacity, power quality problems, power protection, computer-controlled systems, auditing, energy reduction, lighting systems, cogeneration, waste heat recovery, and HVAC systems. Each entry is one to several pages in length and covers critical issues and solutions in many important emerging areas of the energy efficiency field.