I?ve been attempting to model a building that has two AHUs complete with HRVs that serve active chilled beams, FCUs and displacement ventilation. Based on some threads I?ve seen on here, I?ve set up the air to supply from the HRVs through a dummy zone and to the subsequent air systems that model the ACBs, FCUs, etc.

I?ve ran the model and no air is making its way back from the zones served by the ACBs, FCUs ,etc to the HRVs. How is this accomplished? Thanks

Darryl Kasun