Great, thanks, well now I feel more confident in the vivo sun, if I'm really paranoid I guess I could have a filter at both ends as wellI'm running 2 (one per tent) right now. One is a vivosun, the other is a gHydro.
I don't run them the entire grow, but most of it. Once they get about a month old I add the filter onto the exhaust. Right now I'm using mine as an output filter. The filter is at the end of the run, on the fan exhaust side, not on the intake side. Inside the tent, on the intake side of the exhaust, I use cheesecloth as a "filter" for bugs/dirt/dust/Lab hairs....