cold rooms adjacent to the apartment with thermusg, how to proceed

[Giovannino60]

I ask, with thermusg I imported the design of my apartment. under the apartment insists a cold compartment. I put a cold voice in the rooms. How do I now make the software that under the apartment is cold?
In example 1 of the software shows an unheated adjacent room but I don't understand how to indicate the same question for the compartment below the apartment or above, such as a attic.
Thank you very much.

 

[gfrank]

selection the loft (structures)
"goccia" button (verification igrometric)
select in the mask the border areas of the structure, the first created rooms
see drawing: