You can only report total energy used, not total power used.
Watts is power and kilowatt-hours is energy.
It is not an irrelevant pedantic point.
If you are teaching science formulas, you need to get the units correct.
btu/hr is a unit of power and watts is also a unit of power.
1 btu = 1055.06 joule.
1 hour = 3,600 seconds.
1 btu/hr = 1,055.06 joules/3,600 seconds.
1 btu/hr = 0.293 joules per second = 0.293 watts.
1 watt = 3.412 btu/hr.
1 watt-hour = 3.412 btu.
Energy can be measured and reported in many different units.
The primary unit of energy in the International System of Units (SI) is the joule (J), but other units like kilowatt-hour (kWh), calorie (cal), and British thermal unit (Btu) are also commonly used.
Power can be measured and reported in any units of energy divided by any units of time.
For example, calories per decade, joules per second, joules per minute, btu per week etc.
The watt (symbol: W) is the International System of Units (SI) unit of power, representing the rate of energy transfer, equal to one joule per second (1 J/s).
To get the C.O.P, you can divide Power Delivered by Power Consumed or you can divide Energy delivered by Energy consumed.
The main thing is to use consistent units for the numerator and denominator.
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