For 2026, this DIY mini split comparison weighs MRCOOL’s 24 SEER2 against Zone...

https://wiki-tonic.win/index.php/What_Maintenance_Do_DIY_Mini_Splits_Need_Each_Month%3F

For 2026, this DIY mini split comparison weighs MRCOOL’s 24 SEER2 against Zone Air’s 23 SEER2. Choose MRCOOL for value above -15°F, or Zone Air Hyper Heat for heating down to -22°F. Let your winter lows guide the pick.