hello folks,

I just received the comments from the reviewer and have some questions about them. The reviewer questioned a lot about the fan power simulation.

Q1. AppendixG assumes each floor served by an individual AHU in baseline case. However my system is quite complex: image a vertical section view of the building, then different systems serve various vertical areas. In the proposed design case, I modeled as design; in baseline case I left eQuest autosizing these AHU's flowrate. Here comes the quesiton: in Table 6.5.3.1.1B, pressure drop adjustment of AHUs need input of heat recovery device in the baseline. The table says "Pressure drop of device at fan system design condition" for the heat recovery device. How can I find it? The system layouts are totally different between design case and baseline case, so I think I can't use the info from the design case.

Q2. My AHU is 100% of outdoor air supply with heat recovery, however, even though I forced eQuest's minimum outside air ratio to be 1.0, the SV-A still reported the OUTSIDE AIR RATIO is 0.267 and various AHUs had similar values. Is that the right way to model this system? I input 90% of supply air flowrate into the RETURN FLOW in eQuest . I hope eQuest had not regarded it as the recirculation air.
Plus, in this 100% of outdoor air system, is the fan supply volume supposed to be always the same as the ventilation rate?

Q3. Some underground areas are served by PTAC according to G3.1.1 exceptions. But in the design case these areas are conditoned by AHU with heat recovery. Do I need to model heat recovery for the PTAC systems?

Your quick reply is highly appreciated.