Intake fraction. you will use a cmfr model to estimate the if for carbon monoxide (co) in two cases:

(a) emissions into an occupied house (e. g., from the continuous pilot light on a natural gas stove) and
(b) emissions into an urban air basin (e. g., from motor vehicles). you may assume that co is non-reactive and all processes occur at constant rates so the if is the ratio of the rate at which co is inhaled to the rate at which it is emitted. the volumetric breathing rate (qb) is 0.5 m3/hour/person.