As of October 2023, 10 SEER (Seasonal Energy Efficiency Ratio) condenser units are no longer manufactured due to updated energy efficiency regulations in the United States. The U.S. Department of Energy has set higher minimum efficiency standards, requiring new units to have a SEER rating of at least 14 in most regions. Consequently, most manufacturers have phased out 10 SEER units, focusing instead on higher-efficiency models.
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