Comparing DIY mini splits for 2026? MRCOOL offers 24 SEER2 efficiency; Zone...

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Comparing DIY mini splits for 2026? MRCOOL offers 24 SEER2 efficiency; Zone Air’s 23 SEER2 may be the better value if you only need dependable heat above -15°F. For colder climates, choose Hyper Heat, which can heat down to -22°F.