Ventilation guidelines are based on the minimum ventilation rate required to maintain acceptable levels of effluents. Carbon dioxide is used as a reference point, as it is the gas of highest emission at a relatively constant value of 0.005 L/s. The mass balance equation is:
Q = G/(C − C)
*Q = ventilation rate (L/s)
*G = CO generation rate
*C = acceptable indoor CO concentration
*C = ambient CO concentration