For 2026, the best cold-climate mini splits deliver up to 24 SEER2 efficiency...

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 cold-climate mini splits deliver up to 24 SEER2 efficiency and heat down to -22°F, making them great for harsh winters. Expect to save $1,500 to $3,000 by DIY installing using line sets from 8 to 75 ft