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What is seer rating
LG LWHD1500ER 15000 BTU Window Air Conditioner has an energy efficiency rating of 12.0 EER, compared with other products that mostly do not pass 10.0 EER (EER meaning "Energy Efficiency Ratio" and a higher EER means that the air conditioner is more efficient)
ENHANCED ENTITY RELATIONSHIP OR EXTENDED ENTITY RELATIONSHIP
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Every appliance has a power rating in Watts which will be found on the condensing unit's label. The units Energy Efficiency Rating (EER) is also promonently displayed. EER is the number of btu transfered for each Watt consumed. 7tr = 84kbtu@ EER 10(average) = 8.4kW 8.4 kW is an average requirement for a 7 ton unit. The actual power consumption depends on: insulation, indoor/outdoor temperature difference, thermostat setting, humidity, indoor heat sources, and other factors which affect duty cycle (the percentage of time the compressor is running).
The cooling efficiency of air conditioners is typically measured using the Seasonal Energy Efficiency Ratio (SEER) or Energy Efficiency Ratio (EER). SEER is the more common measurement as it takes into account the unit's performance over an entire cooling season, while EER is a single-point measurement based on a set of conditions. The higher the SEER or EER rating, the more efficient the air conditioner.
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Used in texts, "eer" means ever erring which implies ever making mistakes.
The energy efficiency rating of a unit is typically determined by measuring its energy consumption against its output, using standardized testing procedures and calculations. This rating is often displayed as an Energy Efficiency Ratio (EER) or Seasonal Energy Efficiency Ratio (SEER) for cooling systems, or a Coefficient of Performance (COP) for heating systems. A higher rating indicates better energy efficiency.
Based on typical ac equipment naming conventions - 24 - in the model number indicates 24,000 btuh nominal or about 24 tons cooling capacity.These models are advertised to be up to 14.5 SEER/12.5 EER, but could be as low as 13 SEER the actual ratings would depend on the exact match. With the complete model numbers you can find this information in the AHRI database at