For 2026, the top 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 top DIY cold-climate mini splits deliver up to 24 SEER2 efficiency and heat down to -22°F. Expect savings of $1,500 to $3,000 by skipping pros, plus flexibility with 8 to 75-foot line sets