A 3-zone DIY mini split lets you control the temperature in multiple rooms...

https://www.nav-bookmarks.win/looking-to-heat-and-cool-multiple-rooms-without-the-hassle-of-ductwork-a

A 3-zone DIY mini split lets you control the temperature in multiple rooms without rewiring your whole house. Many systems are efficient down to -13°F and boast SEER2 ratings around 24, keeping your energy bills low