Passive is totally fine on a 600, and I'd still go for a larger exhaust. Again with the need to control temps, ya know?
The local grow shop here was putting together a package that includes a tent, exhaust, 600digi complete, climate controller (oooh! trickness!), carbon scrubber, and ducting for only like $1200 (I'd have to check but it is a ridiculously low number) TOTAL, whcih is a KILLER deal on all those toys. The shopkeeper is someone whose instincts I trust, he encourages use of the 600digi in the space, and one of my buddies just picked up that pile o' goodies and is currently veggin' away like a mofo.
Oh, and check out the odorsok carbon filter... it's COOL. (and cheap and easy to get rid of and even machine washable! hahahaha)

I'd have to be a sadistic bitch to tell you to go for the K.

The jury's still out on that one though...
stinkyattic Reviewed by stinkyattic on . Will this exhaust 1000 watt HPS? Well, this site seems to be overrun with underage smokers rather than of age growers, and there doesn't seem to be enough traffic in the grow forums, so I'm attempting at asking my questions seperatly. Will this exhaust a 1000watt HPS aircooled hood from a 4x4 hydrohut? Vortex 4 Fan Carbon Filter Combo - Vortex Power Fans Rating: 5