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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).

27.2.1.1.2 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

Pre-Retrofit

Retrofit changes

Required metering

Retrofit

Post-retrofit

CL/TS

Load but still CL

One time load measurement

One time load measurement

CL/TS

Load to VL

One time load measurement

Sufficient load measurements to characterize load

CL/TS

Schedule but still TS

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

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