For 2026, the best cold-climate mini splits hit 24 SEER2 efficiency and keep...

https://iris-wiki.win/index.php/What_Is_the_Real_Weekend_Workload_for_Installing_a_DIY_Mini_Split%3F

For 2026, the best cold-climate mini splits hit 24 SEER2 efficiency and keep heating down to -22°F, making them reliable in harsh winters. DIY installs save $1,500 to $3,000 versus pros