Shopping DIY mini splits in 2026? MRCOOL’s 24 SEER2 edges Zone Air’s 23 SEER2,...

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Shopping DIY mini splits in 2026? MRCOOL’s 24 SEER2 edges Zone Air’s 23 SEER2, but the real choice is best value above -15°F or Hyper Heat performance down to -22°F. Choose for your winter lows, not just the efficiency rating.