For 2026, MRCOOL’s 24 SEER2 edges Zone Air’s 23 SEER2. The choice is...

https://smart-wiki.win/index.php/How_Much_Can_24_SEER2_Save_Per_Year_Compared_to_22_SEER2%3F

For 2026, MRCOOL’s 24 SEER2 edges Zone Air’s 23 SEER2. The choice is straightforward: pick MRCOOL for value if your winters stay above -15 F; choose Zone Air’s Hyper Heat if you need heating down to -22 F.