A homeowner is trying to decide between a high-efficiency natural gas furnace with an efficiency of 97
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A homeowner is trying to decide between a high-efficiency natural gas furnace with an efficiency of 97 percent and a ground-source heat pump with a COP of 3.5. The unit costs of electricity and natural gas are $0.115/kWh and $0.75/therm (1 therm = 105,500 kJ). Determine which system will have a lower energy cost.
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Related Book For 
Fundamentals Of Thermal-Fluid Sciences
ISBN: 9781260716979
6th Edition
Authors: Yunus Cengel, John Cimbala, Afshin Ghajar
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