In 2026, the top DIY cold-climate mini splits hit efficiency ratings up to 24...

https://sirachapete736.gumroad.com/p/quick-connect-fitting-keeps-leaking-what-did-i-do-wrong

In 2026, the top DIY cold-climate mini splits hit efficiency ratings up to 24 SEER2 and operate reliably down to -22°F. Most systems support line sets from 8 to 75 feet, perfect for varied layouts