Looking to install your own mini split? DIY systems with pre-charged R-454B...

https://sierra-wiki.win/index.php/How_Much_Does_It_Cost_to_Install_a_12K_Mini_Split_With_an_Electrician%3F

Looking to install your own mini split? DIY systems with pre-charged R-454B quick-connect linesets make it simple—no vacuum pump or EPA Section 608 license needed