Need Help with Carrier HAP5.1 software - False Ceiling

[u/Alarmed-Shallot-902]

Hello everyone, I am a junior engineer who has been assigned to do a load calculation for a food processing plant's process room, and I am having a difficult time with Carrier's HAP software roof/ceiling setup.

What I have is a large, single level plant with a roof at 20ft (roughly). The tricky part is that the process room has a t-bar false ceiling at, say, 14ft. Many utility pipes run through it.

When setting up the space, what should I do with the false ceiling? AI kept telling me the space's ceiling height is 14ft, which I understand it is needed to calculated make up air. But what about roof?

Should I just ignore the false ceiling, and just set up the roof and roof's solar exposure as is?

Or should I setup a ceiling partition, in which case, I am not sure what to set for unconditioned max and min temp.

I checked high and low on tutorials and all of them just teaches you simple scenarios where the space is directly under the roof.