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Common Geothermal Terms



When shopping for a new geothermal heating and cooling system, you may come across some unfamiliar terminology. Below, we have put together easy to understand explanations for common geothermal terms to assist Lexington home and business owners in making informed heating and cooling choices.

EER: EER stands for Energy Efficiency Ratio, which will tell you the ratio of cooling produced by the heat pump compared to the amount of energy consumed. A higher EER means higher efficiency levels.

COP: COP stands for Coefficient of Performance, which is a ratio that compares the heating produced by a heat pump to the amount of energy the system consumes. The higher the COP, the higher the unit’s efficiency.

Compressor: The system’s compressor moves refrigerant through the geothermal heat pump by increasing its temperature and pressure while reducing its volume. As refrigerant is pumped through the system by the compressor, heat is transferred between the heat pump and your living areas.

Water Flow Control: Water is constantly circulating in the underground loop to exchange heat between the heat pump and the earth. The system’s water flow control regulates the circulation of water using fixed speed or variable speed control. Variable speed water flow controls are a more energy efficient option.

Indoor Fan: The geothermal system’s indoor fan circulates heated and cooled air into the home or building through duct work. The indoor fan is located inside the heat pump. Variable speed and single speed fans are available, though variable speed fans offer better energy efficiency.

Electronic Controls: The heat pump’s electronic controls control the system’s operation and receive information from the geothermal system’s thermostat. Communicating and non-communicating controls are available on geothermal systems. Communicating electronic controls offer improved efficiency versus non-communicating controls, as they allow for communication between the thermostat and the heat pump as well as other components in order to determine the best settings that will optimize your comfort and control energy use.

If you have questions about geothermal terminology or a new geothermal system for your Lexington home or business, call Climate Control today.

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