Contractor working on a residential HVAC system. The updated efficiency rules affect new residential HVAC equipment manufactured in or imported into the United States on or after Jan. 1, 2023. (Photo: David Spates/Shutterstock)

A new year often brings new regulations for many industries, and beginning Jan. 1, 2023, HVAC manufacturers will have an updated set of efficiency guidelines to follow for residential HVAC system equipment imported to or made in the United States.

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