So the inline fan I am using is rated at IP66 or IPX4 which means it is dust and water tight. It has a 6” or 150mm opening with airflow of up to 700m3/h, PA up to 323 Pa and uses 90w. There noise level is rated to 42dBa @ 3m. The ducting is a combination of an inner aluminium foil and plastic outer layer. At the moment I turn it on and point in at the direction of where I am sweating, laser CNC’ing or soldering.