Looking to keep three rooms comfortable without shelling out for a full HVAC...

https://www.e-architect.com/articles/best-3-zone-diy-mini-split

Looking to keep three rooms comfortable without shelling out for a full HVAC overhaul? A 3-zone DIY mini split is a solid choice. With a heating rating down to -13°F and an efficient SEER2 rating around 24, it handles cold winters while saving energy