The days of overbuilding and overspecifying cleanrooms may be over, at least, if Tengfang (Tim) Xu, researcher and manager in energy programs at Lawrence Berkeley Labs (Berkeley, Calif.) has anything to do with it. "For every 10% increase in airflow rate, there is a 30% increase in energy usage by fans, in theory. If facilities scale down to the necessary level needed for contamination control, a great deal of energy cost can be saved." Xu recently presented an online course, "Sustainability Considerations in Cleanroom Design and Operation," as part of the Institute of Environmental Sciences and Technology (IEST) Access the Experts educational series.
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