Contact the natural gas provider in your city and find out how much you are being charged for each ft3 of natural gas. Also, contact your electric company and determine how much they are charging on average per kWh usage of electricity. If a hot-air gas furnace has an efficiency of 94% and an electric heater has an efficiency of 100%, what is the more economical way of heating your home: a gas furnace or an electric heater?
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