You don't necessarily have to vent to your attic. You can vent anywhere as there will be no odor coming out of a carbon filter. If you use CO2 you can vent back into your room.
grey1223 Reviewed by grey1223 on . Odor Control What's an efective way to control odor from 5-10 plants in a 10x8 room? I keep seeing stuff about a carbon scrubber, but what's that? Same thing as a charcoal filter? And would a carbon scrubber require one to duct the air up through the attic? Anybody have a photo of a carbon scrubber in action? Rating: 5