An energy audit is an inspection, survey and analysis of energy flows for energy conservation in a building, processes or system to reduce the amount of energy input into the system without negatively affecting the output(s). The term energy audit is commonly used to describe a broad spectrum of energy studies ranging from a quick walk-through of a facility to identify major problem areas to a comprehensive analysis of the implications of alternative energy efficiency measures sufficient to satisfy the financial criteria of sophisticated investors. Audit is required to identify the most efficient and cost-effective energy conservation opportunities (ecos) or measures (ecms). Energy conservation opportunities (or measures) can consist in more efficient use or of partial or global replacement of the existing installation.

An energy audit is an inspection, survey and analysis of energy flows for energy conservation in a building, processes or system to reduce the amount of energy input into the system without negatively affecting the output(s). The term energy audit is commonly used to describe a broad spectrum of energy studies ranging from a quick walk-through of a facility to identify major problem areas to a comprehensive analysis of the implications of alternative energy efficiency measures sufficient to satisfy the financial criteria of sophisticated investors. Audit is required to identify the most efficient and cost-effective energy conservation opportunities (ecos) or measures (ecms). Energy conservation opportunities (or measures) can consist in more efficient use or of partial or global replacement of the existing installation.