Installing a mini split system doesn’t have to be complicated. Many models come...

https://wiki-net.win/index.php/R454B_Refrigerant_in_DIY_Mini_Splits:_Is_It_Different_from_Older_Units%3F

Installing a mini split system doesn’t have to be complicated. Many models come with a pre-charged quick-connect lineset up to 16 feet, so you can skip the vacuum pump and avoid needing an EPA Section 608 license