IES-VE User Forum

I am modeling a building where:

1. The roof of the building is like a small park - covered with grass and trees.
2. The walls of the building are covered with metal grills where vines and leaves are growing.

I would like to know how to accurately add this into my model.

I am trying to use the "add void/split space vertically" to create a return air plenum on me ceiling to for my room.
I go to the "ceiling" section and select "return air plenum", define a height,
Did not tick the split space vertically box, and selected "none" in the "floor section.

When I clicked ...

I am new to IES and HVAC in general.
I just ran a simulation with ApacheHVAC and it produced a few result files.
I am wondering what is the difference between the .CLG and .CLN file produced from the ApacheHVAC simulation.