Similar to how extrapolation of data for a submeter that was recently installed is appropriate, can I interpolate between bimonthly water bills in order to produce the monthly consumption summary? If so, does anyone have an acceptable interpolation method to share?
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Hannah Bronfman
Senior Associate99 thumbs up
January 30, 2013 - 1:49 pm
Hi Ryan
The key thing about this credit is that you have to provide weekly meter readings, at a minimum. These readings are not required to be automated, and therefore could be taken manually. The manual allowance is there for instances where bills come in monthly, bi-monthly, or quarterly intervals.
Thanks
Hannah
Ryan Nelson
January 30, 2013 - 4:56 pm
That makes sense, but perhaps my question was unclear. Since weekly readings weren't taken until the performance period, I cannot be expected to use weekly readings to satisfy the "monthly and annual consumption summaries" requirement of this credit's documentation, correct? Exporting Energy Star data is an acceptable method, and that is often tracked by using monthly bills. But if a property receives bills less frequently (e.g., bimonthly, quarterly), what is an appropriate interpolation method to produce a summary with monthly granularity as part of the tracker that must accompany the credit form? Or could I just do a bimonthly trend analysis instead of a monthly analysis for the 2 years that are required for the summary?
Thanks!
Hannah Bronfman
Senior Associate99 thumbs up
January 31, 2013 - 11:51 am
Hi
Thanks for the clarification. Yes, you can take the data collected during the performance period and extrapolate monthly and annual summaries. But again, this credit requires that meters are also read and recorded weekly (at a minimum) during the performance period.
Hope this helps!