For 2026, the best cold-climate mini splits deliver reliable heat down to -22°F...

https://mike-wiki.win/index.php/Can_I_Heat_My_Whole_House_with_Multi-Zone_DIY_Mini_Splits_in_New_England%3F

For 2026, the best cold-climate mini splits deliver reliable heat down to -22°F with efficiency ratings above 24 SEER2. DIYers save $1,500 to $3,000 by installing units with 8-75 ft line sets included