Comparing MRCOOL and Zone Air DIY mini splits for 2026? MRCOOL offers 24 SEER2;...

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Comparing MRCOOL and Zone Air DIY mini splits for 2026? MRCOOL offers 24 SEER2; Zone Air, 23 SEER2. The key choice: best value above -15°F, or Hyper Heat that runs down to -22°F. Match the unit to your winter lows and budget.