For 2026, top cold-climate mini splits hit 24 SEER2 efficiency and work down to...

https://shed-wiki.win/index.php/MRCOOL_DIY_5th_Gen_12K_Specs_I_Should_Compare_Before_Buying

For 2026, top cold-climate mini splits hit 24 SEER2 efficiency and work down to -22°F, keeping homes cozy without sky-high electric bills. DIY installs save $1,500-$3,000 compared to pros