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How Eer Is Calculated?

Chloe Bennett • • 6 min read
How Eer Is Calculated?

The EER rating for an air conditioner is calculated by dividing the BTU (British Thermal Units

British Thermal Units
The unit MBTU is used in natural gas and other industries to indicate 1,000 BTUs. However, there is an ambiguity in that the metric system (SI) uses the prefix "M" to indicate one million (1,000,000), and consequently "MMBtu" is often used to indicate one million BTUs.
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) rating by the wattage. For example, a 12,000-BTU air conditioner that uses 1,200 watts has an EER rating of 10 (12,000/1,200 = 10). ... The higher the EER rating is, the more energy efficient the unit will be.

What is EER and how is it calculated?

EER is nothing but the BTU rating of an HVAC divided by its wattage. For example, a 12,000 BTU air conditioner that uses up only 1,100 Watts of power, such as the Whynter Elite ARC-122DS, will have an EER = 12,000/1,000 = 10.9.

What is a good EER?

Generally, an EER of 12 or above is considered energy efficient, however, when comparing two models, the one with the higher EER is more energy efficient regardless of whether or not it is above 12.

Chloe Bennett
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Chloe Bennett

Chloe Bennett explores the intersection of pop culture, streaming entertainment, digital trends, and contemporary lifestyle. Her weekly commentary reaches thousands of culture enthusiasts.