2026 DIY mini split matchup: MRCOOL brings 24 SEER2; Zone Air, 23 SEER2. Choose...

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2026 DIY mini split matchup: MRCOOL brings 24 SEER2; Zone Air, 23 SEER2. Choose the best value if winters stay above -15°F, or Zone Air Hyper Heat for heating down to -22°F. Let your local winter lows—not a tiny efficiency edge—make the call for your home