Seasonal Energy Efficiency Ratio
Seasonal Energy Efficiency Ratio (SEER) is a rating used to measure the energy efficiency of an air conditioning or heat pump system over an entire cooling season. It is calculated by dividing the total cooling output (in British Thermal Units, or BTUs) by the total energy consumed (in watt-hours) during that time. A higher SEER rating indicates a more energy-efficient system, with modern units typically ranging from 13 to over 20.
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