You bought a house of dimension 40 ft x 30 ft x 20 ft and are shopping for a central heating system to be installed in your house. You want it to be warm at a comfortable temperature of 70 Fahrenheit even when the outside temperature is a brutal -9 Fahrenheit. ( 1 m = 3.281 ft )
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What is the ideal COP you can have for the heating system for your house ?
