R 325.52007
R 325.52007 Exhaust ventilation systems.
Cite as Mich. Admin. Code R 325.52007
Rule 7. The minimum rate of exhaust ventilation for places of
manufacturing, processing, assembling, maintenance and repair, or storage of material
shall be 1 cubic foot of air per minute per square foot of floor area. This amount of
exhaust ventilation may be provided by local exhaust, general exhaust, or both. The
director may permit a variance if contaminant control is accomplished at a lesser rate
of ventilation.