Thinking about a DIY mini split system? These units come with pre-charged...

https://tessatopmaid.com/how-do-i-pick-between-wall-mount-cassette-and-concealed-duct-mini-splits/

Thinking about a DIY mini split system? These units come with pre-charged R-454B quick-connect linesets, so you can skip the vacuum pump and the EPA Section 608 license hassle. Many 9K and 12K models even offer simple 115V plug-in options