Thinking about installing a mini split yourself? With pre-charged R-454B...

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

Thinking about installing a mini split yourself? With pre-charged R-454B quick-connect linesets, you skip the need for a vacuum pump or an EPA Section 608 license. Models like the 9K and 12K even offer simple 115V plug-in options