On the Hakko 850 SMD rework station what is the CFM rating for the pump?

The pump in the Hakko 850 SMD Hot Air Rework Station is rated at a minimum airflow of 20 L/min or 0.706 CFM. Measurement of this specification must be made at the outlet tube from the pump reservoir. There is no established maximum airflow rating as it does not apply to the use of the pump in this product.