Comparing 2026 DIY mini splits? MRCOOL’s 24 SEER2 tops Zone Air’s 23 SEER2, but...

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Comparing 2026 DIY mini splits? MRCOOL’s 24 SEER2 tops Zone Air’s 23 SEER2, but the real choice is best value above -15°F or Zone Air Hyper Heat down to -22°F. Match the unit to your winter lows, not just its efficiency rating.