Thinking about a DIY mini split install? These systems use pre-charged R-454B...

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

Thinking about a DIY mini split install? These systems use pre-charged R-454B quick-connect linesets, so you skip the vacuum pump and EPA Section 608 license hassle. The 9K and 12K models plug into standard 115V outlets