Installing a DIY mini split system just got easier. Use pre-charged R-454B...

https://research-wiki.win/index.php/Do_I_Need_a_Permit_to_Install_a_Mini_Split_Myself%3F

Installing a DIY mini split system just got easier. Use pre-charged R-454B quick-connect linesets—no vacuum pump or EPA Section 608 license needed. These units offer simple 115V plug-in options for 9K and 12K models