air conditioner
Found this online "New Energy Minimum Standards (January 1, 2015)
Regional climate differences play a part in the US Department of Energy’s revised energy minimum standards. The regional approach recognizes that there is little cost benefit to having a very high SEER air conditioning unit in the northeastern region of the United States, where cold weather often prevails. Starting January 1, 2015, central air conditioners installed in the southeastern and southwestern regions of the United States must be at least 14 SEER. Central air conditioners installed in all other states outside of the southeastern and southwestern regions must continue to be a minimum of 13 SEER. "
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