This web site describes the activities of the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. (ASHRAE) Technical Committee 9.11, Clean Spaces. It does not present official positions of the Society nor reflect Society policy. ASHRAE is not responsible for this site's content. To learn more about ASHRAE activities on an international level, contact the ASHRAE home page at http://www.ashrae.org. Comments? Contact us at wsun@engsysco.com @2003, ASHRAE TC 9.11.