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

https://www.last-bookmarks.win/thinking-about-installing-a-mini-split-yourself-diy-kits-with-pre-charged

Thinking about a DIY mini split? These systems come with pre-charged R-454B quick-connect linesets, so you skip the vacuum pump and avoid needing an EPA Section 608 license