Lots of cities have building codes for multifamily residential that requires independent ventilation for each unit to reduce cross contamination, or requires zo

Lots of cities have building codes for multifamily residential that requires independent ventilation for each unit to reduce cross contamination, or requires zones and duct work that prevents such mixture of air. This generally isn't true in commercial office buildings, which are more along the lines of what you're talking about. But often tenants themselves don't even directly control their temperature at will; it is managed by property management.