For 2026, MRCOOL vs. Zone Air comes down to your winter lows: both deliver...

https://zoom-wiki.win/index.php/Do_I_Really_Need_a_Disconnect_Box_for_a_Mini_Split_Condenser%3F

For 2026, MRCOOL vs. Zone Air comes down to your winter lows: both deliver strong DIY heating, with Zone Air rated 24 SEER2 and MRCOOL 23 SEER2. Want best value above -15°F, or Hyper Heat that keeps working down to -22°F?