MRCOOL’s 24 SEER2 and Zone Air’s 23 SEER2 DIY mini splits boil down to winter...

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

MRCOOL’s 24 SEER2 and Zone Air’s 23 SEER2 DIY mini splits boil down to winter value: choose MRCOOL for heating above -15°F, or Zone Air Hyper Heat for warmth down to -22°F. Buy for your coldest nights, not just the efficiency rating, in your area.