Help needed!!

[Hummingbird]

I have a classroom about 65m2 with two radiators of 3300W each.
The radiatos are on the floor.

There is also a mechanical ventailation supply of 660m3/h and two extracts of 330m3/h

I am trying to calculate the comfort index.
I am also using the boundary conditions for 21st of December from the Apache calculation where I have set the ventilation profiles and the heating profile.

I am not sure if I should turn off the heating profile and the ventilation at the apache and then use the radiators at the CFD.

From what I can understand is that exporting the boundary conditions I am only affecting the surface temperature in the CFD and not the air temperature around the space. That means that I have a space without any kind of heating function so the CFD calculation is independent from the heating profiles in the Apache calculation. In the CFD I have to add the heating elements (like the radiators) to simulate the real heating function of the space . Is this correct?

How can I add at the CFD , students who are seating at the their seats and set the gain for each one? Is there a component of a student to function as CFD component?

Thank you in advance.