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

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