Systemair RVK250E2-A1

The Systemair RVK250E2-A1 is a 85w centrifugal fan made in Germany with an ebmpapst motor.
As the name suggests it is a 250mm diameter fan.
The approximate air output is 330l/s and will remain within 90% of that rate even when placed under high pressure applications like drawing through long lengths of duct or carbon filters.
The Systemair centrifugal fan is ideal for use in high pressure applications precisely because it will sustain a reasonable airflow regardless of the pressure.