The 13 SEER minimum applies to all new equipment manufactured on or after January 23, 2006. You may continue to use your current system indefinitely, even if it operates below 13 SEER, but when it's time to replace your system, only 13 SEER or higher models will be available.

Higher SEER means cost-savings and energy efficiency

For many homeowners, a 13 SEER air conditioner or heat pump will save money on each month's electric bill. Exactly how much you can save will depend on the efficiency of your current system. For example, a 13 SEER product:

Delivers about 23% energy savings compared to 10 SEER models
Delivers about 8% energy savings compared to 12 SEER models
Actual savings will depend on the age, efficiency and condition of the unit being replaced, but if you are currently considering a new air conditioner or heat pump, it makes sense to start saving now with a 13 SEER product.