Thanks for the advice and pointing out actual air exchange to light cooling. I sorta spaced on the two different venting issues, air cooling the light in a closed system and the actual changing of the air in the wardrobe.

A DIY filter for sure is the way to go, easy to build and not to mention expensive commericial filters. Seen it before and seems super easy to customize.

Using one centrifugal fan is a given for the cooltube, since heat has been the major issue on all of my grows besides feeding probs. A second one, as much as my wallet hates the idea, might be needed. I know carbon filters require a certain amount of pressure to work so I'm thinking that a second centrifugal would be needed, tell me if I'm wrong though and an inline fan would surfice.

My whole goal of this setup is to get the right parts together (fans, mylar, filter, other odd ends) and build it once and not spend time messing around with having to upgrade or change stuff, especially once full swing into a grow.

Next challenge, fan selection. Any suggestions on who to go with (Eclipse, Vortex, Hurricane, Can-Fan, etc)?

Peace