IEST issues guidance on designing AMC filtration

Published: 30-Jul-2009
HVAC Sustainability

The US Institute of Environmental Sciences and Technology (IEST) has issued guidance on designing filtration systems to eliminate trace amounts (less than 1ppmv) of airborne molecular contamination (AMC).


According to IEST-G-CC035.1: Design Considerations for Airborne Molecular Contamination Filtration Systems in Cleanrooms and Other Controlled Environments, AMC can affect processes in microelectronics, pharmaceuticals, medical devices, and nanotechnology. The need for AMC control may apply to safety requirements, process yield improvements, odour control, and other situations.

The guideline discusses applications, potential points of use, filtration methods, materials of construction, performance comparison and follow-up assessment. It also covers the secondary impact of the filters on the rest of the heating, ventilating and air-conditioning (HVAC) system, and the exterior impact on the filtration system (including environmental conditions, upsets and spills). In addition to cleanroom facilities, the document provides a framework for applications such as laminar flow stations, mini-environments, isolators, and glove boxes. www.iest.org

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