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[TRNSYS-users] increased capacity of air

Hi all,
 
I am simulating a low energy 18-zones building wioth mechanical ventilation. I increased the capacity of the air in the zone by a factor 5, as we generally do in TRNSYS simulations.
 
Now I wondered, whether this is logical when considering the energy losses through exhaust of the ventilation system: am I not taking 5 times the energy content? Do I have to adapt my ventilation flow rates in order to compensate?
 
I use a flow rate expressed in ACH as input to type 56.
 
Leen