For 2026, the top DIY cold-climate mini splits offer efficiency up to 24 SEER2...

https://www.grandmashousediy.com/best-diy-cold-climate-mini-split-hyper-heat-models-compared-mrcool-vs-cooper-hunter-vs-zone-air-2026/

For 2026, the top DIY cold-climate mini splits offer efficiency up to 24 SEER2 and reliable heating down to -22°F. Expect line sets between 8-75 feet for flexible installs