a new device that has a reduced variable load, and a variable schedule, then the pre-retrofit and post-retrofit metering should use continuous or short-term measurement that are sufficient in length to allow for the characterization of the performance of the component to be accomplished with a model (e.g., regression, or engineering model). Detailed Retrofit Isolation Measurement and Verification Procedures

Appendix E of ASHRAE's Guideline 14-2002 contains detailed retrofit isolation procedures for the measurement and verification of savings, including: pumps, fans, chillers, boilers and furnaces, lighting, and large and unitary HVAC systems. In general, the procedures were drawn from the previous literature, including ASHRAE's Research Project 827-RP70 (i.e., pumps, fans, chillers), various published procedures for boilers and furnaces,71'72,73'74'75'76,77 lighting procedures, and calibrated HVAC calibration simula-tions.78,79 A review of these procedures, which vary from simple one-time measurements, to complex, calibrated air-side psychrometric models, is described it the following sections.

Table 27.5: Metering Requirements to Calculate Energy and Demand Savings from the ASHRAE Guideline 14-2002.69


Retrofit changes

Required metering




Load but still CL

One time load measurement

One time load measurement


Load to VL

One time load measurement

Sufficient load measurements to characterize load


Schedule but still TS

One time load measurement (either pre- or post-retrofit)

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