In this 2026 DIY mini split heat pump comparison, MRCOOL delivers 24 SEER2,...

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In this 2026 DIY mini split heat pump comparison, MRCOOL delivers 24 SEER2, while Zone Air offers 23 SEER2. Choose MRCOOL for value above -15°F; pick Zone Air Hyper Heat if you need heating down to -22°F. Your winter lows make the call.