How can the efficiency of an A/C unit be measured?

The efficiency of an air conditioning unit is primarily measured by calculating the Energy Efficiency Ratio (EER) or the Seasonal Energy Efficiency Ratio (SEER). These metrics give a quantitative measure of how effectively the unit converts electrical energy into cooling output. EER measures the cooling output in British Thermal Units (BTUs) per hour relative to the power input in watts during steady conditions, providing a snapshot of efficiency under specific circumstances. SEER takes a broader view by averaging the efficiency of the unit over an entire cooling season under varying conditions, making it a more comprehensive measure of performance.

Using EER and SEER allows for standardized comparisons between different units and is crucial for consumers to make informed decisions based on energy use and potential operating costs. Thus, by focusing on these two ratios, one can evaluate and compare the efficiency of various air conditioning systems effectively.