I recently got to experience zone control in this airbnb my friends and I rented.
The upstairs had the living room, kitchen and two bedrooms.
The downstairs was a remodeled basement with a bedroom. I paid a little extra to have my own room and be separated from the group. The basement thermostat totally controlled only that HVAC equipment. It was really nice since the girls upstairs were constantly fighting over AC and the exact temperature it was set at. I just adjusted my thermostat to 73 degrees and left it the whole trip. The only downside to basement living was the air quality. A basement is below ground level so naturally it is quite musty. Additionally the air quality is a little wet like. The homeowners did have a dehumidifier in the basement that was working 24/7. There was even a sign on the little device begging me not to turn it off. There were no worries on that front. Even with the AC drying out the air quality and the dehumidifier, the air felt almost like a jungle. If I left clothes out they felt a little damp and cold. My ipad always had a layer of mist on it. I didn’t really enjoy that wet feeling all night long. It just goes to show you that HVAC can only take you so far. The basement is a livable space, but I wouldn’t want to stay there forever. Four days with the wet indoor air conditions was just about all I could stand. I was ready to go when the trip was over.