In 2026, top cold-climate mini splits deliver reliable heat down to -22°F with...

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

In 2026, top cold-climate mini splits deliver reliable heat down to -22°F with efficiency ratings up to 24 SEER2. DIY homeowners can save $1,500-$3,000 by handling installs themselves