Developed in 1991 by Air Craftsmen, Inc., with its low noise - low horsepower and large filtering capacity, we call it the “Biggest Little Filter on the Market.” The filter is available in various modules depending on air volume requirements. Unit may be supplied with or without exhaust blower and motor. Waste is deposited in heavy-duty plastic bags (2 per section) for easy disposal. Waste container bags may be reused. Key Benefits include: high efficiency low air to cloth ratio and environmentally clean, separating 99.9% of particles.