Monthly Degree Days Figure 927

• If envelope information is readily available and the Building Load Coefficient has been determined by analysis of all the individual components, the regression derived BLC gives us a "real-world" check on the calculated BLC.

• Linear regression also gives feedback in terms of how "good" the relationship is between fuel consumption and local climate, giving a good indication as to the thermal "weight" of the building, discussed in Section 9.9.

The following is a brief overview of the regression procedure as it can be applied to corresponding pairs of monthly Degree-Day and fuel consumption data. The Building Load Coefficient which describes the actual performance of the building can be determined with the following relationship:


the number of degree-day/fuel consumption pairs the degree days accumulated for an individual month the energy or fuel consumed for an individual month. The monthly base fuel consumption can be calculated as:

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