Beginning in 2023, all new residential central air-conditioning and air-source heat pump systems sold in the United States will be required to meet new minimum energy efficiency standards. The most recent minimum energy efficiency standards for these equipment types went into effect in 2015, and for the first time, separate standards were set for cooling central air conditioners sold in the northern parts of the United States and those sold in the southern parts. The new standards continue to set different cooling efficiency levels for air conditioners in the south, and they also require an increase in the heating efficiency of all air-source heat pumps Source: Today in Energy – Efficiency requirements for residential central AC and heat pumps to rise in 2023
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