For a 2026 DIY mini split, compare more than efficiency: check line-set length,...

https://spencersexcellentcolumn.scriblorax.com/posts/20-btu-per-square-foot-rule-when-does-it-break-down

For a 2026 DIY mini split, compare more than efficiency: check line-set length, cold-weather heating, and everyday convenience. A 24 SEER2 unit with an 8-75 ft line set may suit one layout, while -22 F operation matters in colder climates.