To qualify for a Warnock Hersey mark, a fire door must comply with local and national codes, requirements and standards as determined by an Intertek inspection or previous certification. The Warnock Hersey mark demonstra... More »

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Intertek's Warnock Hersey Mark is a mark certifying product safety and performance used in North America, including on wood fire-rated doors. Intertek is a company that ensures products meet safety, health, environmental... More »

Intertek's Warnock Hersey Mark is a mark certifying product safety and performance used in North America, including on wood fire-rated doors. Intertek is a company that ensures products meet safety, health, environmental... More »

Warnock Hersey is a mark used in North America to indicate compliance with building codes and safety standards on construction sites. The symbol is commonly found on wood fire-rated doors. More »

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Fireplaces that include the Warnock Hersey mark are available at thousands of fireplace retailers throughout the United States, such as Fireplace Center in Hilo, Hawaii; California Stove & Supply in Concord, California; ... More »

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Warnock Hersey is not the brand name of a wood stove manufacturer, but rather a product safety and performance verification mark which appears on nearly 80% of all wood stove doors in North America. The WH Mark is issued... More »

The basic safety requirements for a fire door include the need for self-closing to avert or minimize the spread of toxic gases or fire. The door should also feature an appropriate latching device to ease people’s mobilit... More »

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