[Bldg-sim] mechanical ventilation independent from air cooling system in eQuest

[Xavier García Casals]

Hello,
Which is the best way to deal with a mechanical ventilation system (with 
economizer and heat recovery options) independent from the air cooling 
system?
To reproduce the physical system, two air systems should be defined for 
each zone, one for cooling (for example split system single zone DX), 
and another for ventilation (each one with its own fans). Would it be 
possible to define two air systems for a zone?
The other option is to trying to include the ventilation system effects 
into the air cooling system, but it won't lead to a precise treatment of 
both fans.
What do you think?
Regards,