Dan Stradford is CEO of Action Duct Cleaning, Altadena, CA. He is on the board of directors of the National Air Duct Cleaners Association, chairman of its Certification Committee, and editor and chairman of its technical papers. He is also an IKECA certified exhaust cleaning specialist and has authored three books and more than 250 articles and papers.

Robert Verdugo is a senior account engineer for the western U.S. for Action Duct Cleaning and a member of AIB International and BEMA (Bakery Equipment Manufacturers and Allieds).