This 2026 DIY cold-climate mini split comparison looks at Zone Air and MRCOOL...

https://kilo-wiki.win/index.php/Why_Doesn%E2%80%99t_MRCOOL_Have_a_115V_DIY_Option_in_2026%3F

This 2026 DIY cold-climate mini split comparison looks at Zone Air and MRCOOL for winter heat, kit parts, line length, wiring, and upkeep. One model is rated to -22°F; check its heating output at your local design temperature before you buy.