I am in the process of building a new spraybooth myself. Going to put 2 or 3 239 cfm axial fans in it.
Can someone explain the "plenum" concept here? I am a IT manager, and only time I have heard plenum before is for plenum rated cat 5 or cat 6 cable, but I don't think I want a network drop in my spraybooth
Does it refer to airspace between the back of the unit with the fans and the filter?