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

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2026 DIY mini split matchup: MRCOOL offers 24 SEER2; Zone Air, 23 SEER2. Choose MRCOOL for best value above -15°F, or Zone Air Hyper Heat for operation down to -22°F. Your local winter lows and budget should guide the call before you buy in your area.