I have not done an exhaustive search, but it seems that all of the air side systems in the prototype models are modelled with only a supply fan.

I see that Appendix G has some language about the baseline fan setup needing to match the proposed design and I can see how this is difficult to implement when there is no proposed design, but if one is trying to assess the savings associated with system elements that would typically have a second fan (energy recovery, in this case) should a second fan be added to accurately reflect the savings?

I am looking to understanding generic savings only and so also do not have a proposed design to model. Am I good just adding the fan power limitation pressure drop adjustment to the supply fan in the same way as the prototypes seem to do or will this approach produce inaccurate savings estimates?