Comparing DIY mini splits for 2026? MRCOOL offers 24 SEER2 and the best value...

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Comparing DIY mini splits for 2026? MRCOOL offers 24 SEER2 and the best value in climates above -15°F. Zone Air’s 23 SEER2 Hyper Heat keeps heating down to -22°F. Choose based on your winter lows, not the one-point efficiency gap.