Warnock Hersey (WH) Mark

The Warnock Hersey (WH) Mark is the leading Fire Product Safety and Performance Mark for Building and Construction products

For 125 years, Intertek’s Warnock Hersey (WH) has been one of the most trusted marks in the building products industry. Throughout that time, manufacturers and AHJs have viewed WH as the preferred mark for fire safety certification.

Products bearing the Warnock Hersey certification indicate compliance to relevant building codes, association criteria, and product safety and performance standards. The mark also signifies that the product’s manufacturing site(s) undergo periodic follow-up inspections to ensure ongoing compliance of the originally certified product.

The Warnock Hersey Mark can be found on products ranging from fire doors, hardware, and hearth. Utilizing the Warnock Hersey Mark on a product reflects a commitment to product safety, performance, and quality to inspectors, builders, and end users. The mark also signifies that the product’s manufacturing site(s) undergo periodic follow-up inspections to ensure ongoing compliance of the originally certified product.

Intertek provides customers a solution that moves with the direction of the industry and simplifies the certification process. This clears the path for an even faster time to market and overall ease of labeling.

Testing Standards for the Warnock Hersey Mark
We test your products to applicable standards including NFPA, BS, ANSI, UL, CAN/ULC, ASTM, CCMC, CSA and EPA.

Accreditations
Intertek is an OSHA (Occupational Safety & Health Administration) recognized NRTL (Nationally Recognized Testing Laboratory) in the U.S. and accredited as a Testing Organization and Certification Body by the Standards Council of Canada. We are also accredited by the International Accreditation Service (IAS), an International Code Council company.

Building Products Environmental Certification Program
CE Mark
SMA Testing and Certification
Marine Products Testing
Miami-Dade County Testing

Global Network of Laboratories

Intertek is one of the world's largest Testing, Inspection and Certification companies. We have a network of laboratories across North and South America, Europe and Asia to deliver safety testing and certification for your products. Our teams around the world provide Global Expertise with Local Service. No one partners with manufacturers better than Intertek to deliver the services you need, when and where you need them.

What countries accept the WH Mark?

The WH Mark is an accepted demonstration of product compliance in the United States, Canada, the Middle East, North Africa and South America. However, it is important to note that through our scope of worldwide accreditations, Intertek is authorized to furnish the product safety marks required to internal sale and distribution, including the NOM Mark, CE Mark, GS Mark, and S Mark, to name a few.

Intertek Directory of Building Products

Search and view information on the Directory of Building Products, including Product Listings, Code Compliance Research Reports (CCRRs), Certificates of Compliance (COCs), Quality Assurance, and Industry Programs.

Field Labeling
Get the proper labeling required by code and avoid unnecessary removal and replacement of your buildings fire doors. Field labeling may become necessary for a variety of reasons, such as field modifications, doors leaving the factory without labels, incorrect labeling, or labeling that has been painted over or removed.

Product Certification Services

With a wide range of engineers and subject matter experts across the world, we can help you with your Product Certification and Building Code Evaluation needs. Our Approach to obtaining certification is centered around you, the time-to-market, flexible services, global approvals and innovative testing solutions.

Fire Door Inspections

AS an integral part of your building’s overall fire protection system a properly operating fire-rated door, is a key component to the compartmentalization of a building to stop the spread of deadly fire, smoke and toxic fumes.

Will the mark be accepted by AHJs?

Yes. The WH Mark is widely accepted amongst AHJs throughout the world.

Our testing and certification services include: