Comparing DIY cold-climate mini splits for 2026? Zone Air and MRCOOL are worth...

https://iris-wiki.win/index.php/Do_I_Need_Backup_Heat_If_My_Mini_Split_Is_Rated_to_-13%C2%B0F%3F

Comparing DIY cold-climate mini splits for 2026? Zone Air and MRCOOL are worth checking for low-temperature heating, included line sets, and setup needs