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

https://fun-wiki.win/index.php/Are_R454B_Mini_Splits_Safer_or_Just_a_New_Requirement%3F

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.