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

https://post-wiki.win/index.php/Is_the_Thin-Air_11,000_BTU_Concealed_Unit_at_$2,699.99_Worth_It%3F

Thinking about a DIY mini split? These systems use pre-charged R-454B quick-connect linesets, so there’s no need for a vacuum pump or EPA Section 608 license. Plus, plug-in 115V options for 9K and 12K units make installation simple