What is EER?
Energy Efficiency Ratio, or EER, is a measure of efficiency for HVAC systems based on their cooling output. Every system requires some form of energy input to run the system, but not every system can make the most of the inputted energy to produce greater output. EER is an objective method to measure and compare different HVAC systems.
Why does EER matter?
EER is calculated by dividing the energy output by the energy input. The greater the EER, the more efficient your system is. An HVAC system with a EER of at least 3.4 is producing more energy than is required to run it in the first place! Geothermal systems are highly efficient and typically have EERs between 15 and 25.
Put simply, the more efficient your HVAC system is, the more bang you’ll get for your buck! Choosing an efficient HVAC system with a higher EER will help you minimize your monthly cooling bills.
What’s the difference between EER and COP?
Coefficient of Performance, or COP, is another measure of efficiency for HVAC systems used for calculating heating output. In contrast, the term EER is more commonly used for measuring cooling output or AC.
We can easily convert between COP and EER: a COP of 1 is equivalent to an EER of 3.4.