Choosing a DIY mini split for 2026 comes down to cold-weather needs: MRCOOL...

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Choosing a DIY mini split for 2026 comes down to cold-weather needs: MRCOOL delivers value above -15°F with 24 SEER2, while Zone Air’s 23 SEER2 Hyper Heat can heat down to -22°F. Decide whether extra cold-weather reach is worth the trade-off.