For 2026, the best cold-climate mini splits run efficiently down to -22°F with...

https://wiki-aero.win/index.php/Do_Hyper_Heat_Mini_Splits_Actually_Work_at_-10%C2%B0F%3F

For 2026, the best cold-climate mini splits run efficiently down to -22°F with impressive 24 SEER2 ratings. Most units come with an 8-75 ft line set allowing flexible installs