Carrier central air conditioners have seasonal energy efficiency ratios between 13.2 and 21, as of 2015. The Infinity model air conditioners hold the highest SEER ratings, followed by the Performance and Comfort models.
Select sizes of the Infinity 19VS, Performance 13, Performance 13 Compact, Comfort 13 and Comfort 13 Coastal models have not earned an Energy Star rating. All other 2015 models meet or exceed the program's energy efficiency standards.
The Environmental Protection Agency requires all residential air conditioners manufactured after January 2006 to have SEERs of 13 or higher, as of 2015. Only units with SEERs of at least 14.5 are eligible for an Energy Star qualification.