2026 DIY mini split face-off: MRCOOL gives 24 SEER2; Zone Air, 23 SEER2. The...

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2026 DIY mini split face-off: MRCOOL gives 24 SEER2; Zone Air, 23 SEER2. The real call? Best value above -15°F, or Hyper Heat for use down to -22°F. Check winter lows before you buy: efficiency matters, but cold-weather range may matter more for your home