U.L. listing and classification are stated throughout the worldwide construction market, but it seems many people are in the dark about what they are and the difference between the two. This post explains the background behind U.L and what it means for the products you are using in your buildings.
All consultants and engineering professionals concerned with performance and safety in buildings, and in particular in air ductwork, can take comfort that the specification of UL Listed Products ensures that those products meet a comprehensive Standard and that independent UL inspectors perform regular follow up factory inspections to ensure product consistency.
Who is U.L.?
U.L. (Underwriters Laboratories) is an independent, not-for-profit product safety testing and certification organization, founded in 1894. Over the last century, Underwriters Laboratories has become the world’s best known independent product safety certification organization. Millions of products and their components are tested to UL’s rigorous safety standards.
What is Listed?
A published list stating the product has been tested to and complies with the applicable Standard and maintains periodic inspection to assure production of the listed products are in accordance with the listing. Having UL Listing guarantees that the product fully complies with each and every one of UL’s requirements in the applicable Standard, and the manufacturer’s product can then bear the UL Mark.