Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
I think both approaches are correct. The results should be similar when you run the simulation. In the first pic you have double high walls divided per floor. If you are doing comfort analysis the radiant temperature could be different. If you have a split wall each wall may have a different temperature if you have adjacent buildings or something that can cause shading in parts of the wall.
