For 2026, DIY cold-climate units from Zone Air and MRCOOL merit a close look....

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

For 2026, DIY cold-climate units from Zone Air and MRCOOL merit a close look. Compare -22°F heat, SEER2, line-set fit, and power. Check your room load and winter lows; read the install guide first