2026’s DIY mini split matchup: MRCOOL brings 24 SEER2; Zone Air, 23 SEER2. The...

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2026’s DIY mini split matchup: MRCOOL brings 24 SEER2; Zone Air, 23 SEER2. The key call is simple: choose best value if winters typically stay above -15 F, or Hyper Heat for warmth down to -22 F