Another lack regarding the monitoring procedure concerns the eligibility ranges of the calculated calibration indices. With respect to historical buildings, taking these indexes monthly as a reference, it is very approximate and not sufficient useful in order to accurately evaluate the effects of the strategies adopted. Therefore, it is necessary to perform the accuracy of the model on an hourly basis. Moreover, the tolerance ranges considered by the main guidelines on calibration [16][17][18] are too wide and it is necessary to establish new ranges more suitable to define a calibrated model for historical building.

4. Conclusions

The expected results from the research are listed below:
·       define a procedure that facilitates and allows the correct calibration of historical building models;
·       define which are the main parameters to be taken into consideration to perform the calibration in the absence of the monthly consumption data;
·       to establish the correct limits to be considered for historical buildings regarding the calculation of the calibration indexes;
·       to establish which are the main input parameters in the implementation of the model that influence its microclimatic behavior, by defining some reference buildings to facilitate calibration for those that have similar characteristics;
·       optimize the procedure for acquiring environmental data and information necessary to characterize the building's microclimate and guarantee a more accurate calibration of the model.

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