Thinking about a DIY mini split installation? With pre-charged R-454B...

https://station-wiki.win/index.php/Can_a_DIY_Mini_Split_Really_Heat_When_It_Is_-13%C2%B0F_Outside%3F

Thinking about a DIY mini split installation? With pre-charged R-454B quick-connect linesets, you can skip the vacuum pump and avoid needing an EPA Section 608 license. Plus, 9K and 12K models offer simple 115V plug-in options