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 value above -15°F or Zone Air Hyper Heat, which keeps heating down to -22°F. Match the unit to your winter lows.