Referring to the pasted in ductwork diagram, if an inline ventilation fan with a high CFM airflow was used to circulate air within a sealed ductwork system, would the fast moving airflow result in a significant pressure drop within the ductwork and cause a section of it to implode?
Or since it is a sealed system and air can neither leave nor enter it, would the result be that the fan would essentially just be circulating pressurized air around the ductwork and there would thus be no pressure drop within the ductwork? Referring to the ductwork diagram again, would static and dynamic pressure (in PSI) at points A, B, C, and D be approximately the same if measured first with the fan turned off and then measured again with the fan turned on?
Although this appears to be a homework question, it is not. I am contemplating running ductwork from my house to my garage and I want to make sure that what I construct will not implode.