For 2026, an easy-to-install mini split with a 20 SEER2 rating is a great pick....

https://beaussmartwords.rivetgarden.com/posts/do-quick-connect-fittings-leak-over-time-on-diy-mini-splits

For 2026, an easy-to-install mini split with a 20 SEER2 rating is a great pick. Look for models that run on a standard 115V plug, so you won’t need a costly electrical upgrade