For 2026, the best DIY cold-climate mini splits deliver 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 best DIY cold-climate mini splits deliver up to 24 SEER2 efficiency and heat down to -22°F, keeping homes cozy all winter. Most units support 8-75 ft line sets, making installation flexible