For 2026, top cold-climate mini splits hit up to 24 SEER2 efficiency and work...

https://wiki-book.win/index.php/Does_DIY_Installation_Void_Warranty_for_Zone_Air_or_MRCOOL%3F

For 2026, top cold-climate mini splits hit up to 24 SEER2 efficiency and work down to -22°F, perfect for harsh winters. They support line sets from 8 to 75 feet, letting you flexibly place units. DIY installation can save $1,500 to $3,000 compared to pros