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

https://blast-wiki.win/index.php/How_Long_Does_a_Single-Zone_Wall_Mount_Mini_Split_Install_Take%3F

Thinking about a DIY mini split? These systems come with pre-charged R-454B quick-connect linesets, so you skip the vacuum pump and don’t need an EPA Section 608 license