1. The RTU Annual Usage Calculator (companion to RTU protocol SBW format) is Excel sheet for a single site 4- week monitoring (often automated using SAS for larger volume work). Takes data logger results for a 4 week monitoring period (about 40,000 rows of data) Aggregates to hourly and daily averages Produces diagnostic plots, and allows point editing Produces RTU signatures for two occupancies, default: weekday and weekend Produces NAC, savings estimate will require a separate output for pre-NAC and post-NAC

2. Calculator Inputs RTU power by minute (could be from single calibrated CT) RTU outside air temperature by hour from minute data or from local weather station) RTU supply air temperature by minute (not necessary for annual usage estimate but useful for estimating minimum osa %) Annual Histogram for normal average daily temperature at site

3. Calculator Outputs Operating history graphs Measurement of fan power and duty cycle from minute data kW vs. temperature mode map Signatures for weekday and weekend operation Normalized annual energy use estimate

4. Operating History

5. Operating History w/Minimum Hourly Supply Temperature

6. Mode Map kW vs. Hourly Temp

7. Signature Graph

8. Normalized Annual Output