For 2026, compare DIY mini splits by more than SEER2. Line-set length, noise,...

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For 2026, compare DIY mini splits by more than SEER2. Line-set length, noise, cold-weather performance, and parts support matter in everyday use. A 24 SEER2 unit with an 8-75 ft line set may suit one room, while -22 F heating claims deserve a closer look.