For a straightforward 2026 mini split install, look for models with a SEER2...

https://shed-wiki.win/index.php/Zone_Air_12,000_BTU_Plug-In_Model_-_Will_It_Heat_in_Winter%3F

For a straightforward 2026 mini split install, look for models with a SEER2 rating above 18 for efficient cooling and heating. A 115V plug-in unit can save you from rewiring but usually caps at smaller rooms