According to Efficiency Valuation Organization (EVO), "M&V is the process of using measurement to reliably determine actual savings created within an
individual facility by an energy management, energy conservation or energy efficiency project or program. As savings cannot be directly measured, the savings can be determined by comparing measured use before and after implementation of a project, making appropriate adjustments for changes in conditions."

M&V of energy savings, generated through building systems retrofits and upgrades, requires special project planning as well as unique engineering practices.

Although several common practices exist for M&V of energy savings, it is not an exact science. There are many resources available that can be used to learn more about the engineering techniques and tools used for verification of energy savings. This website is intended to provide some of those resources and tools to perform and support M&V activities.