Comparing MRCOOL and Zone Air DIY mini splits for 2026? MRCOOL’s 24 SEER2 edges...

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Comparing MRCOOL and Zone Air DIY mini splits for 2026? MRCOOL’s 24 SEER2 edges Zone Air’s 23, but the real choice is value above -15°F or Hyper Heat that keeps working down to -22°F. Match the unit to your winter lows—not just the efficiency number.