American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) 
  

National Institutes of Health (NIH)

American National Standards Institute (ANSI)

International Air Filtration Certifiers Association (I.A.F.C.A.)

Occupational Safety & Health Administration (OSHA)

The Public Health and Safety Company (NSF)

Independent Certification Services, Inc. (ICS)

American Conference of Governmental Industrial Hygienists (ACGIH)

Centers for Disease Control and Prevention (CDC)

U. S. Environmental Protection Agency (US EPA)

Controlled Environmental Testing Association (CETA)

Institute of Environmental Sciences and Technology (IEST)

National Institute for Occupational Safety and Health (NIOSH)

National Environmental Balancing Bureau (NEBB)

American Biological Safety Association (ABSA)