NFPA 270: Standard Test Method for Measurement of Smoke Obscuration Using a Conical Radiant Source in a Single Closed Chamber
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What is NFPA 270?
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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What does NFPA 270 address?
The principal fire-test-response characteristic obtained from using NFPA 270 is the specific optical density of smoke from the specimens tested. An optional fire-test-response characteristic measurable with this method is the mass optical density, which is the specific optical density of smoke divided by the mass lost by the specimens during the test.Table Of Contents.
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