Have been using a Soler & Palau T-250 Fan which fits 10 inch round duct in combination with a barley box. All installed in 2012 and is still performing well and without issues.
Folks are correct in that SP is a major factor in air flow. One must take into account, run length, number and type of elbows, etc to determine the overall CFM. And as pointed out, a window box fan is not an acceptable option for the lampworker.
|