Contact Us

Manufacturers with questions about certification should contact:

Director of Certification
1111 19th Street, N.W.
Suite 402
Washington, DC 20036
Tel: (202) 872-5955

Certification Program Administrator
Intertek ETL SEMKO
3933 US Route 11
Cortland, NY 13045
Tel: (800) 345-3851
  or (607) 753-6711

Consumers with questions about CADR (clean air delivery rate) should contact: 

or request additional information by mail by calling toll free 1-800-267-3138