5. Determine VRs using transient method

Transient CO2 mass balance models to determine ventilation rates (VRs) per person 

Currently, VRs per person are normally estimated from peak indoor CO2 concentrations, assuming occupancy and VR are stable for a sufficient period to reach equilibrium. But the assumed equilibrium conditions are often not attained because VRs and occupancy vary over time. The goal of this task is to employ a transient mass balance model for measuring VRs using CO2 concentrations and occupant counts.

  • Install CO2 sensors and occupant counters in two buildings. 
  • Collect data to determine the accuracy of transient method of determining VRs.