In 2026, top DIY cold-climate mini splits hit up to 24 SEER2 efficiency and...

https://record-wiki.win/index.php/SEER2_vs_HSPF2:_Which_Matters_More_for_Winter_Heating%3F

In 2026, top DIY cold-climate mini splits hit up to 24 SEER2 efficiency and operate reliably down to -22°F. Systems with 8-75 ft line sets simplify installs, letting you save $1,500-$3,000 on professional labor