Overlay the pressure drop graph of your extraction fan on the graph and you will find an intersection (crossover point) between the two operating curves. Tracing down from this intersection you can read the airflow of a particular fan / filter combination.

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CFM = M3/Hr ÷ 1.699    INS WG = Pa ÷ 249.

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Fan Types:
You can use two main fan types with the Mountain Air® Filter (Mixed-Flow & Centrifugal Fans).

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