For those not understanding how this carbon filter would fit into a grow room set up, this is how i set mine up.
carbon filter(about 18"Lx7"W)>>Valueline 6 Inch fan (435 CFM with adjustable speed at 1/2 the speed)>> 6" ducting>>600w hps light>>6" ducting>>400W MH light>>ducting>>out the window...