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Standard Test Method for Measurement of Smoke Obscuration Using a Conical Radiant Source in a Single Closed Chamber

This test method provides a means of measuring smoke obscuration of essentially flat materials, products, or assemblies (including surface finishes) up to 25mm thick, when exposed to specified levels of thermal irradiance in a single closed chamber.

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NFPA 270

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Happy holidays! NFPA® will be closed December 25–January 1. Place your orders by Wednesday, December 16 to ensure domestic delivery by year end. We wish you all a safe and enjoyable holiday week, and look forward to assisting you in the new year.

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