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Calibration errors for the pre- and post-retrofit models and its requirement.
| ASHRAE guideline 14 requirement | Pre-retrofit energy model | Post-retrofit energy model | |
|---|---|---|---|
| Minimum period spanned by baseline data | 12 months | 12 months | 10 months |
| CV(RMSE)a | 15% | 7.98% | 8.50% |
| NMBEb | 5% | 4.55% | 1.23% |
CV(RMSE) = the coefficient of variation of the root mean squared errors.
NMBE = normalised mean bias error.
