Phat Charcoal Fiber Odor Filters Options:Charcoal Fiber Filter 4" since the heating element stays

since the heating element stays on ONLY for the time you set on the dial

myco-active mix is recommended for growing outdoor foliage crops

Powerful on their own

Double hook and loop seal

Phat Charcoal Fiber Odor Filters Options:Charcoal Fiber Filter 4" since the heating element staysPhat charcoal fiber odor filters feature a tightly woven 3 layer charcoal fiber technology that removes particulate matter as well as odor and gasses from the air. This super efficient, high capacity odor filter can be used with high CFM fans unlike traditional carbon filters. Perfect for scrubbing and supplemental odor control. Great back up filter for controlled, sealed rooms with high temperature triggered exhaust fans. Greenhouse charcoal fiber