What is SEER?

The efficiency of central air conditioning units is governed by U.S. law and regulated by the U.S. Department of Energy (DOE). Every air conditioning unit is assigned an efficiency rating known as its “seasonal energy efficiency ratio” (SEER). The SEER is defined as the total cooling output (in British thermal units, or BTU) provided by the unit during its normal annual usage period divided by its total energy input (in watt-hours) during the same period.

How does it apply to the energy efficiency of air conditioners?

A higher SEER unit uses less electricity. On January 23, 2006, a new government mandate took effect that raised the minimum efficiency standard for all newly manufactured central air conditioners and heat pumps from 10 SEER to 13 SEER. The regulations require that all products manufactured after that date meet the new standard.

This 30% increase in minimum efficiency could result in energy savings of up to 23% compared to most central air conditioning systems rated at 10 SEER. If your system is more than 10 years old and is rated at only 8 SEER, you can expect to see savings of approximately 55%. All Nationwide Home Warranty Plans cover 13 SEER upgrades at no additional cost.