For 2026, a 115V plug-in mini split with around 22 SEER2 offers a good balance...

https://garrettssmartcolumn.opalvector.com/posts/why-do-pro-install-mini-splits-need-a-vacuum-pump-and-nitrogen

For 2026, a 115V plug-in mini split with around 22 SEER2 offers a good balance of efficiency and ease of install. It works well in spaces up to 600 sq ft and can be DIY installed without special wiring