where c is the measured concentration at the location x, x
c is the measured concentration in the supply air and supply
c is the measured concentration in the exhaust air. exhaust
When the supply air and the room air are mixed entirely,
the concentration, e.g., of a particular gas, will be
the same at each location in the room representing ideal
mixing flow. In that case, the concentration in the exhaust
air equals the concentration at every spot in the room and
all locations in a space will have a contaminant removal
efficiency of m s1.0. Therefore, the contaminant re- x
moval efficiency, m , reflects the ratio between the con- x
centration at one point of the space with a certain airflow
pattern and an ideal mixing flow. Values below 1.0 indi-
cate lower concentration valuessbetter air quality.than
an ideal mixing airflow would provide. Values above 1.0
indicate that some contaminated room air is not exchanged
by fresh supply air, but stays in the room instead short
circuiting..