For 2026, the top DIY cold-climate mini splits deliver up to 24 SEER2...

https://foxtrot-wiki.win/index.php/MRCOOL_DIY_vs_Zone_Air_for_a_One-Room_Addition_with_No_Panel_Space

For 2026, the top DIY cold-climate mini splits deliver up to 24 SEER2 efficiency and heat down to -22°F. Expect savings of $1,500 to $3,000 by skipping pros, plus flexibility with 8 to 75-foot line sets