HVAC layout and design

I am working on preliminary drawings for a 6,000 S.F. athletic building. There will be three HVAC units which are sized and located on the second floor plan. I need drawings that show the rectangular duct layout and sizes. I also need help specifying an ERV (energy recovery ventilator) that will tie into the exhaust for the restrooms. If you can also provide a gas supply riser diagram, that would need to include size of pipe and length of supply pipes.

Thank you