This 2026 DIY mini split heat pump comparison puts MRCOOL against Zone Air: 24...

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This 2026 DIY mini split heat pump comparison puts MRCOOL against Zone Air: 24 SEER2 vs. 23 SEER2. MRCOOL offers the best value if your home stays above -15°F; choose Zone Air’s Hyper Heat for heating down to -22°F. Your winter lows make the call.