text: The basic room purge equation can be used only for purge scenarios.  In a scenario where a liquid continuously evaporates from a container in a ventilated room, a differential equation has to be used:
  where the ventilation rate has been adjusted by a mixing factor K: 
  *C = concentration of a gas
  *G = generation rate
  *V = room volume
  *Q′ = adjusted ventilation rate of the volume