Thanks for the response.

I've thought about the humidity being blown into the attic being an issue, so I've found a way to graft the exhaust from the fan though existing duct work that leads out of the house... fart fan in the bathroom next to it. All should be fine there.

I was wanting to hook my DIY carbon scrubber to the end of my hood with some slack in the ductwork between the two, and run the ductwork to the fan, then into the attic and routed outside. Considering a rather large squirrel cage fan (~950 cfm) took 30-40 minutes to clean the room previously, would an 8" in-line duct fan (~250 cfm... would it be louder than the same CFM vortex fan or something similar?) running constantly keep the room smelling fresh AND keep the 1000w bulb cool enough to be around a foot from the plants? I really want to stay within two feet from the top colas if I can.

All other issues aside... what's a good price for a 1000w setup.... magnetic ballast, 8" air cooled hood, bulb, and all the necessary cords?

Also... has anybody else noticed extremely high temperatures from 4 foot 4 bulb T5's? I'm planning on adding one more set of them in my veg area so the whole closet can be used efficiently, but heat is a major issue in there and I'm worried that a heavy duty fan coupled with 5 air pumps and their respective stones will be too loud... sound proofing is not an option at the moment.

Thanks to everyone who has read my questions so far! If anyone wants to see how the room is setup and/or what's going on in there I can take some pics this weekend and post. Let me know!