For 2026, cold-climate mini splits hitting -22°F with up to 24 SEER2 deliver...

https://iris-wiki.win/index.php/What_Does_COP_2.1_Mean_for_Heat_Pump_Heating_Costs%3F

For 2026, cold-climate mini splits hitting -22°F with up to 24 SEER2 deliver solid heat and efficiency for DIYers. Expect savings of $1,500 to $3,000 by handling installs yourself