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

https://shed-wiki.win/index.php/Is_the_27,000_BTU_(9K%2B18K)_Dual-Zone_Setup_a_Weird_Combo_or_Smart%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 EPA Section 608 license hassle. The 9K and 12K models offer easy 115V plug-in setup