Are portable air conditioners energy efficient?
EER stands for the Energy Efficiency Rating. Essentially, the EER lets you know how much cooling capacity from a given amount of electricity. The higher the EER, the more energy efficient an air conditioner is. If you are comparing two air conditioners with similar BTU capacity, you might check out their EER to help you make a decision. An air conditioner’s EER is found by dividing its BTU capacity by its running wattage. A good rule of thumb is to look at the Energy Efficiency Rating (EER) of the air conditioner you are purchasing. To look at energy efficiency another way, consider this: A portable air conditioner allows you to cool one area. If you have central air conditioning and you want just this one area cooled, you would have to lower the temperature of the entire house as well. So, if you have a home or apartment and you want to keep just a single room cool, a portable air conditioner can save a lot of energy. Energy Efficiency Rating (EER) is a standard measure of efficiency
