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

https://cashsgreatblog.novacrestiq.com/posts/can-i-heat-my-whole-house-with-multi-zone-diy-mini-splits-in-new-england

For 2026, the best DIY cold-climate mini splits deliver up to 24 SEER2 efficiency and operate down to -22°F, making them ideal for harsh winters. Expect to save $1,500-$3,000 on installs with line sets from 8 to 75 feet