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

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Comparing DIY mini splits for 2026? MRCOOL’s 24 SEER2 tops Zone Air’s 23 SEER2 on efficiency, but climate is the real decider: choose the best value if your winter lows stay above -15°F, or opt for Hyper Heat for reliable warmth down to -22°F.