Tackling a 3-zone DIY mini split lets you control comfort in multiple rooms...

https://hotel-wiki.win/index.php/Can_I_Install_a_3-Zone_Mini_Split_Without_a_Vacuum_Pump%3F

Tackling a 3-zone DIY mini split lets you control comfort in multiple rooms without sky-high energy bills. Most systems boast a solid SEER2 rating around 24, keeping your electricity use in check