Question

An air conditioner uses 10543 J of energy to run, but only 5818 J of energy is used to heat or cool the air of a home. What is its energy efficiency?

Answer 1

In order to calculate the efficiency, we need to divide the useful energy by the total energy used:

`e=(P_(useful))/(P_(total))`

So, using the given information, we have:

`e=(5818)/(10543)=0.5518=55.18\%`

Therefore the energy efficiency is 55.18%.