This timely document provides an overview of a variety of energy-related business opportunities for commercial, residential, and institutional buildings. Presents contractors, building owners and operators, facility managers, and system designers with the tools needed to evaluate an existing facility for energy savings potential. Addresses both new construction and retrofits. Includes energy conservation management, the energy audit and energy estimating procedures. HVAC system maintenance and indoor air quality, energy management maintenance and monitoring, energy recovery systems and energy recovery system investment analysis.