What is occupancy density's role in VRP?

• A. It helps determine the outdoor air required per space.
• B. It is not used in VRP.
• C. It determines the building age.
• D. It determines the color of the air.

Answer: (D)

Occupancy density connects how many people are in a space to how much outdoor air is needed under the VRP. In this method, ventilation requirements come from two parts: a per-person rate and a per-area rate. By multiplying occupancy density (people per area) by the floor area, you get the expected number of occupants, which then determines the ventilation needed per person. The VRP then compares that with the ventilation required by the space area and uses the larger value to set the outdoor air supply. So occupancy density directly drives the outdoor air required per space. It doesn’t determine building age or the color of the air, and it is indeed a key input in VRP calculations.