Comparing 2026 DIY mini splits? MRCOOL’s 24 SEER2 beats Zone Air’s 23 SEER2 on...

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Comparing 2026 DIY mini splits? MRCOOL’s 24 SEER2 beats Zone Air’s 23 SEER2 on efficiency, but the real choice is climate: best value above -15°F, or Zone Air Hyper Heat for heating down to -22°F.