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

https://www.sierrabookmarking.win/comparing-diy-cold-climate-mini-splits-for-2026-this-guide-looks-at-zone-air

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.