In 2026, the top DIY cold-climate mini splits offer up to 24 SEER2 efficiency...

https://echo-wiki.win/index.php/R-32_vs_R-454B:_Which_Refrigerant_is_Better_for_2026_Mini_Split_Installs%3F

In 2026, the top DIY cold-climate mini splits offer up to 24 SEER2 efficiency and reliable heating down to -22°F. These units handle line sets from 8 to 75 feet, making installation flexible for most homes