| CPC F24F 11/30 (2018.01) [G05B 13/026 (2013.01); F24F 2110/00 (2018.01); F24F 2130/00 (2018.01); F24F 2130/10 (2018.01); F24F 2140/60 (2018.01); G05B 2219/2614 (2013.01)] | 19 Claims |

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1. A system for building balance-point-based seasonal fuel consumption forecasting with the aid of a digital computer, comprising:
a processor configured to execute code, the processor configured to:
obtain historical daily fuel consumption for thermal conditioning of a building during a time period;
identify internal gains within the building over the time period;
determine adjusted internal gains for the building using a plot, comprising:
obtain average daily outdoor temperatures over the time period;
generate the plot of the historical daily fuel consumption averaged on a daily basis versus the average daily outdoor temperatures over the time period;
obtain a balance point temperature for the building using the plot; and
evaluate the adjusted internal gains using the average indoor temperature and the balance point temperature; and
forecast seasonal fuel consumption for the building associated with a change to the building using the historical daily fuel consumption and the adjusted internal gains, further comprising determining a relationship between at least one of one or more variables associated with the building before and after the change, wherein the relationship is used during the forecasting of the seasonal fuel consumption.
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