In 2026, top cold-climate mini splits hit 24 SEER2 efficiency and run smoothly...

https://star-wiki.win/index.php/What_Is_the_Risk_of_Micro_Leaks_Over_Freeze-Thaw_Cycles%3F

In 2026, top cold-climate mini splits hit 24 SEER2 efficiency and run smoothly down to -22°F. DIY installers save $1,500 to $3,000 by handling setups with 8-75 ft line sets