sentences:  Controls Retrofits, or retrofits to HVAC systems are typically excellent candidates for Option C.
  
  After installing the energy conservation measures (ECMs), the savings created from the project must be determined.This process, termed Measurement and Verification (M&V), is frequently performed by the ESCO, but may also be performed by the customer or a third party.The International Performance Measurement and Verification Protocol (IPMVP) is the standard M&V guideline for determining actual savings created by an energy management program.