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

https://brooksfznx367.theburnward.com/is-18-000-btu-too-much-for-a-single-room-mini-split

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