Controlling temperature and humidity is not possible when this happens because the untreated air reaches the sensors and they try to over-compensate for the untreated air. If a window is open at one end of the room, it throws off the sensors for the entire room. It can also draw in fumes from the street. It is best to keep windows closed at all times. Each area is supplied the appropriate amount of air for the size and occupancy of that space.
Open doors change the size of the space and affect circulation and the even distribution of air.
Unless in use, doors should remain closed as much as possible to avoid disturbing the planned air volume, circulation, and temperature. There is no hall on the south side of level one. This does not affect circulation because the ventilation system for that area is designed to handle the full dimensions of the room. The system normally has outside air at all times, as explained in question 3 above. Butler is not a sealed building.