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

https://mighty-wiki.win/index.php/What_is_a_Concealed_Duct_Mini_Split_and_When_Does_It_Make_Sense%3F

Thinking about a DIY mini split? These systems use pre-charged R-454B quick-connect linesets so you skip the vacuum pump and the need for an EPA Section 608 license. Plus, the 9K and 12K units come with easy 115V plug-in options