MAISY RECS Hourly Loads & Emissions Databases

Question 10. Does the MAISY RECS Extended Database Include Corrections/Adjustments to the Original RECS Data?

Short Answer: Yes, about 2% of RECS end-use annual energy use was determined to be out of “reasonable” bounds and adjusted to be within a standard error-based limit.

Longer Answer: A small number of RECS end use energy use estimates are judged to be out of reasonable bounds. For example, the maximum RECS water heating kWh estimate was 25,824 which reflects more than 9 times the average of 2,808 kWh. The RECS end-use estimation process uses a variance-based calibration adjustment to calibrate its end-use estimates. In short, this process estimates end use energy within the household with statistical and engineering data and then adjusts the difference between the whole building kWh estimate and energy supplier kWh data based on variations observed for different end uses. This process can sometimes exaggerate adjustments to wide-variance end-use estimates based on household characteristics. The MAISY Recs Database development process scans for these out-of-bound estimates and provides a correction, removing excessive end-use estimate kWh and allocating it to the “other” category. A small number of households have other or whole building annual kWh that identifies them as out of bounds as well. These households, which reflect less than 0.1% of all buildings, are removed from the MAISY RECS Database household sample.

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