This 2026 DIY mini split heat pump comparison weighs MRCOOL’s 24 SEER2 against...

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This 2026 DIY mini split heat pump comparison weighs MRCOOL’s 24 SEER2 against Zone Air’s 23 SEER2. Choose MRCOOL for value in climates above -15°F; pick Zone Air’s Hyper Heat if you need heating down to -22°F.