Our selection of carbon filter fan combo systems are the best way to keep those funny smells from leaving the grow room. Our GrowBright carbon filter fan combos are the real deal! You won’t find anything but genuine activated carbon in these filter combos, as opposed to the …questionable materials you’ll find in cheap or DIY filters online. If you are concerned with odor control in your grow room, you will be extremely satisfied with our carbon filter fan combos. Carbon filters literally remove odor particles from the air and trap them within the unit, resulting in drastically reduced odors in your grow environment.