An example of an energy efficient air conditioner is the Frigidaire FFRE0833Q1. This type of air conditioner unit has a high energy efficiency rating, which means the unit helps reduce energy use and lowers electric bills. The Frigidaire FFRE0833Q1 has an Energy Star certification and is rated at 8,000 Btu.
The Energy Star certification is used for appliances with the highest efficiency. The efficiency rating shows the user the cost to power the air conditioner, based on the number of Btu required for each watt of power the air conditioner uses during operation. Simply put, the higher the efficiency rating, the less energy the air conditioner uses to operate.