Nothing happens with mechanical exhaust

[HugoSimulaciones]

Hi guys,

I am modelling an industrial shed. And I have introduced a mechanical exhaust, in System in the tabular room data, but nothing happens. I mean, if I switch off this mechanical exhaust, the heating sensible load doesn´t vary, and it should, because the shed would be in low pressure.
Moreover, I cannot find any information (energy losses) about the extraction in VistaPro.

Someone knows how to model it well, or tell me what is happening?

[Complex Potential]

The system tab extract inputs only impacts fan powers and aux energy. If you want to see an associated heating load, you will need to add the air rate via the aux vent tab (assuming the air is being made up directly from the outside you can leave the adjacent condition as external).