MRCOOL vs. Zone Air in 2026: MRCOOL leads on efficiency at 24 SEER2 versus Zone...

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

MRCOOL vs. Zone Air in 2026: MRCOOL leads on efficiency at 24 SEER2 versus Zone Air’s 23. For the best value above -15°F, choose MRCOOL; for heating down to -22°F, Zone Air’s Hyper Heat is the better fit.