The efficiency of central air conditioning systems is rated by a Seasonal Energy Efficiency Ratio (SEER). SEER ratings typically range from 13 to 23, with the highest numbers indicating the most efficient units that offer the most energy savings year after year. Fortunately, great strides have been made in the last 10 years to increase the efficiency of new air conditioners and heat pumps.
EnergyGuide sticker attached to the outside unit of the air conditioner.
With houses being so tight it is recommended to provide a outside (fresh) air intake.
The typical SEER rating of air conditioners manufactured before 1992 is about 6.0. In 1992, the federal government established the minimum cooling efficiency standard for units installed in new homes at 10. The minimum SEER value changed again on January 23, 2006 to a SEER of 13. To be considered as high-efficiency units, air conditioners must have a SEER rating of at least 14. The SEER rating is usually shown on a yellow and black