Comparing 2026 DIY mini splits? MRCOOL offers 24 SEER2, while Zone Air delivers...

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Comparing 2026 DIY mini splits? MRCOOL offers 24 SEER2, while Zone Air delivers 23 SEER2 and better value when winter lows stay above -15°F. Need heat in colder weather? Zone Air Hyper Heat runs down to -22°F.