The Energy Efficiency Ratio (EER) of a particular air conditioner is calculated by dividing the input electrical power (measured in watts) by the amount of cooling created (measured in British Thermal Units or BTU’s) under a single set of conditions.
Typically, the condition for calculating EER is an outdoor temperature of 95°F and inside temperature of 80°F with 50% humidity.

Cove.tool uses COP value for the energy usage calculations. To convert EER to COP, please use the following formula:

COP = (EER)/(3.41214)

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