Seasonal Energy Efficiency Ratio 2, the updated federal testing standard for air conditioning and heat pump efficiency introduced in January 2023. SEER2 uses the M1 blower test procedure, which adds external static pressure to simulate real-world duct resistance, resulting in lower numbers than the original SEER rating for the same equipment.
Seasonal Energy Efficiency Ratio 2, the updated federal testing standard for air conditioning and heat pump efficiency introduced in January 2023. SEER2 uses the M1 blower test procedure, which adds external static pressure to simulate real-world duct resistance, resulting in lower numbers than the original SEER rating for the same equipment.
When comparing AC units or heat pumps, SEER2 ratings provide a more accurate picture of real-world performance. A 15 SEER2 unit roughly equals a 16 SEER unit under the old standard. Federal minimums in the Southwest are 14.3 SEER2 for split systems.
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