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

https://garrettssmartchat.bearsfanteamshop.com/should-i-trust-marketing-labels-like-cold-climate-or-only-the-spec-sheet

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.