Energy Performance Ratio

The Energy Performance Ratio (EPR) measures how efficiently an energy system, like a building or a machine, uses energy to produce its desired outcome. It is the ratio of useful output (such as heating, cooling, or work done) to the total energy consumed. A higher EPR indicates better efficiency, meaning more of the energy used results in useful work rather than waste. It helps compare the effectiveness of different systems or technologies, guiding decisions to improve energy use and reduce costs or environmental impact.