Measurement & Verification

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Measurement & Verification

systemsM&V is integrated into all of Legacy’s energy efficiency projects. Through detailed studies and extensive use of sub-metering, we develop an accurate energy-use baseline for comparison.  This ensures that: 

  • Progress towards greater efficiency can be monitored and documented;
  • Maximum incentives and subsidies can be received on energy-efficiency projects;
  • Project Payback, ROI and NPV can be accurately calculated in order to prioritize capital allocation for similar projects in the future.

Measurement and Verification (M&V) is meant to confirm and ensure the sustainability of actual energy, gas or water savings achieved through any energy efficiency project. M&V is the perfect tool to address client and supplier concerns in energy efficiency project management.

Main M&V Analysis Parameters

  • Consumption variables: all parameters such as energy consumption, degree-days, temperature sensors, level sensors or any other variables impacting energy consumption.
  • The baseline: consists in obtaining data for a given period prior to any changes to ensure a reliable energy consumption baseline.
  • Baseline adjustment: becomes the expected consumption with reference to the baseline. Using past consumption, it is possible to produce a forecast and compare it with actual data subsequent to the implementation of energy savings project.

Approaches to Measurement


Option A:  - Retrofit isolation – measurement of key parameters

Option B:  - Retrofit isolation – measurement of all parameters

Option C:  - Whole facility

Option D:  - Calibrated simulation

Main M&V Advantages

  • Risk management tool in energy efficiency projects
  • Performance monitoring in energy efficiency projects
  • Excellent financial accounting tool
  • Justification and demonstration of energy savings
  • Sustainable long-term savings
For more information, the international standard for M&V methodology can be downloaded from the Efficiency Valuation Organization website. Please log on to to learn more about the International Performance Measurement and Verification Protocol (IPMVP). back to top