Under the VRP, what must you determine for each space?

• A. The outdoor airflow rate needed to meet minimum IAQ criteria based on occupancy and space characteristics.
• B. The total exhaust air rate for the building.
• C. The indoor temperature setpoint for each room.
• D. The maximum humidity level allowed in each space

Answer: (A)

Under the VRP you determine the outdoor airflow rate for each space that’s needed to meet minimum IAQ criteria, based on how many people use the space and its characteristics. The VRP provides outdoor air rates per person and per unit area, which you combine to size the space’s required outdoor air. In practice, you estimate the occupancy (N) and the floor area (A) for the space and use the formula Q_o = N × R_p + A × R_a to get the minimum outdoor air flow. This ensures contaminants are adequately diluted for that specific space without unnecessarily over-ventilating. The other options don’t describe this space-by-space outdoor-air sizing: total building exhaust is a different consideration; indoor temperature setpoints relate to comfort, not IAQ ventilation sizing; and humidity limits are about moisture control, not the VRP outdoor-air requirement.