The EER (Energy Efficiency Ratio) and the SEER (Seasonal Energy Efficiency Ratio) are two measures of the energy efficiency of air conditioning systems.
- EER is mostly used by air conditioning technicians. It measures the energy efficiency of an air conditioning system at a specific time, usually at full load, and is calculated by dividing the system's cooling capacity by its energy consumption at that time. It is expressed in BTU per hour divided by watt (BTU/hW).
- SEER, on the other hand, measures energy efficiency over an entire season, taking into account load variations and weather conditions. It takes into account the energy consumption over an entire cooling season and divides it by the total amount of cooling provided during that period. It is expressed in BTUs per watt-hour (BTU/Wh). SEER is a good projection of the energy efficiency of your appliance.
In summary, EER measures efficiency at a single point in time, while SEER provides a more holistic view of efficiency over a longer period of time and taking into account varying operating conditions.
