Model BDC, an all-new, compact, dust collector from United Air Specialists Inc. (Cincinnati, Ohio, U.S.A.), is a self-cleaning, continuous-duty system available in eight sizes to fit a variety of volume requirements. All systems feature rugged, heavy-duty construction and uniform, electrostatically applied powdercoated paint that resists fading and chalking. Each system accommodates any one of four different filter designs that reportedly enable the system to maintain up to 99.99 percent filtration efficiency in virtually any dust collection application. Inlet and outlet air connections can be customized to meet specific design objectives as well, including recirculation of filtered air. Also available are multiple hopper dust discharge options for convenient dust containment and disposal.