Greetings,

We are in a process of developing an energy model for a multifamily residential building.

Although that a single dwelling unit can be modeled as one thermal zone, we are about to split the dwelling unit in two thermal zone for several reasons, one of which is that the living room has a balcony and the balcony’s door and its belonging wall are facing different orientation (90 deg).

The other reason, for which we are addressing you for an advice is, that these two thermal zones is supposed to have two different ventilation systems. The is because the bedroom thermal zone is intended to be naturally ventilated, and the other (living room) should have mechanical ventilation since it does not classify for natural ventilation.

In case we arrange the dwelling unit to be modeled with two thermal blocks as described above, the HVAC systems serving them should also be slightly different.

The question is: is the above approach correct (OK), or there some obstacles, which we are missing.

Your support on this issue is highly appreciated.

Thanks,

Vassil