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

https://romeo-wiki.win/index.php/What_Tools_Do_I_Actually_Need_to_Install_a_DIY_Mini_Split%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.