In 2026, top cold-climate mini splits offer efficient heating down to -22°F...

https://wiki-room.win/index.php/Cooper_%26_Hunter_Multi_Zone_Hyper_Heat:_Is_It_DIY_Friendly%3F

In 2026, top cold-climate mini splits offer efficient heating down to -22°F with ratings up to 24 SEER2. DIY-friendly units typically save $1,500-$3,000 on installation by using 8 to 75 ft line sets you can handle yourself