2026 DIY mini split: MRCOOL vs Zone Air. MRCOOL: 24 SEER2; Zone Air: 23. The...

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2026 DIY mini split: MRCOOL vs Zone Air. MRCOOL: 24 SEER2; Zone Air: 23. The choice? Best value above -15°F or Hyper Heat down to -22°F. Pick for your coldest days and budget, not the SEER2 gap alone—then size it right for comfort all year.