Thinking about a DIY mini split install? These systems use pre-charged R-454B...
https://zone-air.com/solutions/diy-mini-splits/
Thinking about a DIY mini split install? These systems use pre-charged R-454B quick-connect linesets, so there’s no vacuum pump or EPA Section 608 license needed. Plus, the 9K and 12K units come with easy 115V plug-in options