For 2026, MRCOOL delivers 24 SEER2 efficiency, while Zone Air offers 23 SEER2....

https://www.ready-bookmarks.win/comparing-mrcool-and-zone-air-diy-mini-splits-for-2026-mrcool-offers-24-seer2

For 2026, MRCOOL delivers 24 SEER2 efficiency, while Zone Air offers 23 SEER2. The choice comes down to your winter lows: choose MRCOOL for value when temperatures stay above -15°F, or Zone Air Hyper Heat for heating down to -22°F.