Estimate the fuel savings obtained by resetting the hot deck of a 60,000 cfm dual duct system by 2°F during the winter and 1°F during the summer. The HVAC system is operated 80 hours per week and serves a building in Chicago, Illinois. For the analysis, assume that the cost of fuel is $6/MMBtu and the boiler efficiency is 80 percent. The average heating season outdoor temperature in Chicago is 34.2 °F. It should be noted that for Chicago, the number of weeks is 30 for the heating season (winter) and 21 for the cooling season (summer).