For 2026, cold-climate mini splits deliver efficient heating down to -22°F with...

https://delta-wiki.win/index.php/What_Maintenance_Should_I_Do_Yearly_on_a_DIY_Mini_Split%3F

For 2026, cold-climate mini splits deliver efficient heating down to -22°F with models hitting up to 24 SEER2. DIY installers can save $1,500-$3,000 on professional setup by choosing units compatible with 8-75 ft line sets