In 2026, the best DIY cold-climate mini splits hit 24 SEER2 efficiency and...

https://future-wiki.win/index.php/MRCOOL_DIY_vs_Zone_Air_for_a_One_Room_Addition_with_No_Panel_Space

In 2026, the best DIY cold-climate mini splits hit 24 SEER2 efficiency and operate down to -22°F, making them ideal for harsh winters. Most kits come with 8-75 ft line sets, covering a wide range of setups