I turned a spare bedroom into a small grow room and am wondering how it vent it. It's 12x12 room with 8ft ceilings. The grow area in the room is 4x6 with one 600w light. I was thinking about going in the attic and disconnect the ac ducts going into the room and use them as exhaust vent with the inline fan mounted in the attic to keep the noise down. Do you think this will work?