What’s the difference between SEER and EER ratings?

The energy efficiency of ACs is all about SEER ratings, EER ratings, and Energy Star labels.

What is SEER?
This stands for Seasonal Energy Efficiency Ratio, and it describes how much energy an AC uses to produce a certain amount of cooling. These ratings apply to central air conditioners.

What is EER?
This stands for Energy Efficiency Ratio, and like SEER ratings, the numbers come from dividing an AC’s cooling output by its energy usage. EER applies to room ACs like window units as well as to central ACs.

SEER ratings have more to do with your area’s specific climate, and a unit’s advertised seasonal efficiency rating might actually go down if you live in an extremely hot climate.

EER ratings are better for comparisons. They don’t factor in seasons, so they aren’t as variable as SEER ratings. The EER rating lets you know how different AC systems work under the same conditions.

Your best resource for utilizing both ratings is your HVAC technician…like us at Small Solutions LLC! Whether you’re looking to install a more energy-efficient system or simply want to understand your current AC better, give us a call and we can help.

 

 

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