2026’s DIY mini split matchup: MRCOOL offers 24 SEER2; Zone Air, 23 SEER2. The...

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2026’s DIY mini split matchup: MRCOOL offers 24 SEER2; Zone Air, 23 SEER2. The real choice? MRCOOL’s better value for heat above -15°F, or Zone Air Hyper Heat for comfort down to -22°F. Pick for your winter lows—not the SEER2 score alone