Thinking about installing a mini split yourself? With pre-charged R-454B...

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

Thinking about installing a mini split yourself? With pre-charged R-454B quick-connect linesets, you can skip the vacuum pump and the EPA Section 608 license hassle. Plus, the 9K and 12K units offer convenient 115V plug-in options