Hello,

I am simulating the ventilation of an electric cabinet. For key components I have the thermal properties, however for some components they are to complex to simulate and I only know heat dissipation, meaning the temperature results will be almost random. 
With this in mind, I would like to apply a blackbox approach, but I am a little bit lost, on how to define the thermal properties. 

Does anyone have any tip on how to define unknown components?