DIY mini split comparison for 2026: MRCOOL has 24 SEER2; Zone Air, 23 SEER2....

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DIY mini split comparison for 2026: MRCOOL has 24 SEER2; Zone Air, 23 SEER2. Pick MRCOOL for value where winters stay above -15°F, or Zone Air Hyper Heat for heating down to -22°F. Your winter lows make the call for your home and climate.