EER vs. SEER: How Do They Differ from Each Other?
Updated September, 2025 In air conditioners, you may have noticed both EER and SEER ratings. These ratings play a vital role in selecting the right air conditioner for your home or work. EER vs SEER is briefly explained here to help you understand the significance of these ratings for making an informed decision. SEER vs. SEER2 (and EER vs. EER2): What Changed & Why It Matters Today’s efficiency labels use updated test procedures to better reflect real-world use. That’s why you’ll often see “2” versions of the ratings. The takeaway for homeowners is
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