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 choice comes down to best value above -15°F or Hyper Heat that keeps working down to -22°F.