Compare 2026 MRCOOL and Zone Air DIY mini splits: MRCOOL offers 24 SEER2 and...

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Compare 2026 MRCOOL and Zone Air DIY mini splits: MRCOOL offers 24 SEER2 and value above -15°F; Zone Air’s 23 SEER2 Hyper Heat works down to -22°F. Choose value for milder winters or extra cold-weather coverage when temperatures plunge.