Installing a mini split doesn’t have to be complicated. Many DIY-friendly...

https://fionafreshmaids.com/is-the-150-250-epa-608-certification-needed-for-diy-mini-splits/

Installing a mini split doesn’t have to be complicated. Many DIY-friendly models come with a pre-charged quick-connect lineset that fits up to 16 feet, so you won’t need a vacuum pump or an EPA Section 608 license