Choosing a DIY mini split in 2026? MRCOOL’s 24 SEER2 tops Zone Air’s 23 SEER2,...

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Choosing a DIY mini split in 2026? MRCOOL’s 24 SEER2 tops Zone Air’s 23 SEER2, but the key trade-off is cold-weather performance: MRCOOL is the best value above -15°F; Zone Air Hyper Heat heats down to -22°F.