SEER2 vs SEER Difference What Every Homeowner Must Know in 2026
Quick Answer: SEER2 vs SEER Difference SEER2 is the updated AC efficiency rating introduced by the U.S. Department of Energy in January 2023. It uses a tougher test that better reflects real-world conditions. Because the test is harder, SEER2 numbers run about 4.5% to 5% lower than old SEER numbers — even for the exact […]
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