In 2026, DIY cold-climate mini splits offer solid efficiency with models...

https://list-wiki.win/index.php/Zone_Air_vs_MRCOOL_for_a_2_Zone_Setup_I_Might_Expand_Later

In 2026, DIY cold-climate mini splits offer solid efficiency with models hitting up to 24 SEER2 and reliable heating down to -22°F. They support line sets between 8 and 75 feet, giving flexible placement