Lifetime energy cost is the sum of the discounted value of the annual energy costs based on assumed water heater life of 13 years. Future electricity price trends and a discount rate of 3.2% are based on Federal guidelines. $0.09 per kWh for electricity is the Federal average price in the U.S. $0.93 per therm for gas is the Federal average ...
Learn MoreStep 5: Determine Fuel Energy. Fuel Energy = Boiler Energy / Combustion Efficiency [ Fuel Energy = 117770 = 81497 / 0.692 ] Assumptions. Deaerator provides feedwater near the boiling temperature for the deaerator's set operating pressure. (Saturated Liquid) Steam Boiler
Learn MoreStep 5: Determine Fuel Energy. Fuel Energy = Boiler Energy / Combustion Efficiency [ Fuel Energy = 168903 = 140189 / 0.83 ] Assumptions. Deaerator provides feedwater near the boiling temperature for the deaerator's set operating pressure. (Saturated Liquid) Steam Boiler
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