The Smokemaster M67 is a self-contained multi-stage media air cleaning system / industrial air filtration system designed for general background cleaning of dust, smoke, soot or other airborne particulate. The Smokemaster M67 unit is a good choice for light duty applications such as sanding, buffing, welding or automotive refinishing at a rate of up to 1980 cfm. Add a Smokemaster to your workplace today.