For 2026, MRCOOL’s 24 SEER2 and Zone Air’s 23 SEER2 mini splits both offer...

https://oliviamaids.com/can-a-multi-zone-diy-system-heat-and-cool-a-whole-house/

For 2026, MRCOOL’s 24 SEER2 and Zone Air’s 23 SEER2 mini splits both offer efficient DIY comfort. Choose MRCOOL for value in climates above -15°F; go with Zone Air Hyper Heat if you need heating down to -22°F.