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

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Comparing DIY mini splits for 2026? MRCOOL offers 24 SEER2, while Zone Air is 23 SEER2. Go with MRCOOL for best value above -15°F; choose Zone Air Hyper Heat if you need heating down to -22°F.