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

https://wiki-room.win/index.php/How_Quiet_Is_a_Mini_Split_Indoors%3F_Is_26_dB_Realistic%3F

Thinking about installing a mini split yourself? With pre-charged R-454B quick-connect linesets, you can skip the vacuum pump and the need for an EPA Section 608 license. Plus, 9K and 12K units come with easy 115V plug-in options