Comparing 2026 DIY mini splits? MRCOOL offers 24 SEER2; Zone Air, 23 SEER2. The...

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Comparing 2026 DIY mini splits? MRCOOL offers 24 SEER2; Zone Air, 23 SEER2. The key choice: best value where winters stay above -15°F, or Hyper Heat for heating down to -22°F. Pick based on your local winter lows.