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

https://kylersgreatblogs.lumenforgex.com/posts/why-do-people-say-mrcool-hyper-heat-is-nearly-twice-the-price-of-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.