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

https://iris-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 vacuum pump and EPA license hassle. Plug in the 9K or 12K units using standard 115V outlets