The scrubber is perhaps one of the most well known devices. Its function is to remove or neutralize harmful substances (silicon tetrafluoride, HNO3, HCI, NH3, phosphoric acid, super phosphate and fluorine) in an exhaust stream before they leave a given system.

Typically, a scrubber infuses a new chemical or mixture into the problematic fumes. In the case of a wet scrubber, vaporized water is infused into the polluted substance and, once the resulting mixture condensed, the pollutants remain in the water while the rest of the gas escapes.

Other scrubbers involve powdered lime and other materials, which react with acid and other harmful chemicals in the fumes, converting them into workable pollution free components.