Shopping DIY mini splits for 2026? MRCOOL’s 24 SEER2 tops Zone Air’s 23, but...

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Shopping DIY mini splits for 2026? MRCOOL’s 24 SEER2 tops Zone Air’s 23, but the real choice is cold-weather performance: pick MRCOOL for value above -15°F, or Zone Air Hyper Heat for heating down to -22°F.