Hello,
Our building is a 100% outside air dedicated outdoor air system (DOAS) running in demand control ventilation. Using the given VRP calculator by USGBC, our total outdoor air flow supplied to the building is greater than the ASHRAE 62.1 requirement. However, the worst case calculation for both minimum and maximum occupancy has one room that does not meet the outdoor airflow requirement. This room is too big to use the 10% exemption rule. Based off of this post https://leeduser.buildinggreen.com/forum/measure-ahus-or-measure-air-flow-each-room it was stated that the compliance only has to happen at the unit level. If this is true would I only put one zone into the calculator even though they have differing occupancy densities? If this isn't true how would we go about meeting this prerequisite?
Thank you