Thinking about a DIY mini split? These systems come with pre-charged R-454B...

https://station-wiki.win/index.php/What_Dual-Zone_Mini_Split_Covers_About_1,200_Sq_Ft%3F

Thinking about a DIY mini split? These systems come with pre-charged R-454B quick-connect linesets, meaning no vacuum pump or EPA Section 608 license is needed. The 9K and 12K models even offer easy 115V plug-in options