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ATTACHMENT 7 Summary of Measurement and Verification Options All the methods in the FEMP/IPMVP Guideline for determining savings are based on the same concept; namely, those energy savings are derived by comparing energy usage after a retrofit to the baseline . It is relatively easy to measure post-retrofit consumption ; however, it is impossible to " measure" what the energy usage would be without the retrofit. Therefore , it is impossible to " measure" energy savings . Energy savings can only be determined based on assumptions about the baseline . Four options are provided to determine energy savings . A particular option is chosen based on the on project-specific features of each performance contract. The options differ in their approach to the level and duration of the retrofit verification measurements . For instance , Options A and B both apply at the system or ECM level , while Option C uses measurements taken at the whole- building , or whole-facility, level . Option A involves short-term ( if any) measurements , while Options B and C use short term and/or continuous or regular interval measurements during the term of the contract. Option D involves computer simulation techniques . Each option has advantages and disadvantages based on site-specific factors . The four options are described in the table below. Overview of M&V Options (from the FEMPIIPMVP) M &V option How savings are Typical Applications calculated A. Partially Measured Retrofit Isolation Engineering calculations Lighting retrofit where using short-term or power draw is measured Savings are determined by partial field continuous post-retrofit periodically. Application measurement of the energy use of the measurements and of controls to vary the system ( s) to which an ECM was applied ; stipulations . load on a constant speed separate from the energy use of the rest of the pump using a variable facility . Measurements may be either short- speed drive . Power term or continuous , draw is measured on a spot basis , while varying Partial measurement means that some but not load . Operating hours of all parameter( s) may be stipulated , if the total are specified/ stipulated , impact of possible stipulation error(s) is not significant to the resultant savings . Careful review of the ECM design and installation will ensure that stipulated values fairly represent the probable actual value . Indian River County, Florida 17 Indian River County Phase 2 Phase II Rev . 10/09