For 2026, top DIY cold-climate mini splits offer efficiency ratings up to 24...

https://kylersgreatblogs.lumenforgex.com/posts/is-the-mrcool-25-ft-plus-25-ft-coupler-kit-worth-the-hassle-for-your-mini-split-install

For 2026, top DIY cold-climate mini splits offer efficiency ratings up to 24 SEER2 and reliable heating down to -22°F. With flexible 8-75 ft line sets, you can install without major rerouting