For 2026, the best DIY cold-climate mini splits deliver efficient heating down...

https://emmasnewjournal.talesignal.com/posts/what-refrigerant-should-i-buy-in-2026-r-454b-vs-r-410a

For 2026, the best DIY cold-climate mini splits deliver efficient heating down to -22°F with SEER2 ratings up to 24. These units support line sets from 8 to 75 feet, allowing flexible placement