For 2026 DIY cold-climate mini splits, expect models with efficiency up to 24...

https://cleaneverycorner.com/how-do-i-size-btus-per-square-foot-for-a-cold-climate-garage/

For 2026 DIY cold-climate mini splits, expect models with efficiency up to 24 SEER2 and reliable heating down to -22°F. Line set lengths range 8 to 75 feet, letting you customize installs