How Is Efficiency Measured?
Air conditioner efficiency is primarily measured by seasonal energy efficiency ratio (SEER) ratings. This number is calculated by dividing the total number of BTUs (British Thermal Units) of heat removed from the air by the total number of watt hours (energy) used per hour to maintain the set temperature.
What is a good SEER rating?
Most modern air conditioners have SEER ratings between 13 and 21. Anything above a SEER rating of 18 is considered a high-efficiency air conditioner. Some air conditioners can have SEER ratings as high as 38, which is extremely impressive. If you want to save money and energy, it’s important to pay attention to the SEER rating in any air conditioning system.
Most Efficient Air Conditioning Systems
The most efficient types of air conditioning systems are ductless mini-split systems, proven to have SEER ratings up to 38. This type of cooling system requires no ductwork and can control the temperatures of individual rooms and spaces in your home.
Ductless mini-splits are great for smaller homes or for when you want to cool only some rooms. For larger homes, the most efficient system is central air conditioning, as it has the ability to cool all the rooms in your home at once. Geothermal systems are also highly efficient, but may require hefty installation and are more expensive.
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