What is the maximum smoke-developed index for duct coverings when tested to ASTM E 84 or UL 723?

The maximum smoke-developed index for duct coverings tested to ASTM E 84 or UL 723 is set at 50. This standard outlines the fire performance criteria for materials used in construction, and the smoke-developed index is an important factor in assessing how much smoke a material generates when subjected to fire. A lower index indicates that less smoke is produced, which is crucial in reducing visibility challenges and inhalation hazards in the event of a fire.

A smoke-developed index up to 50 meets the requirements for various applications, making it suitable for use in duct coverings, where managing smoke production is vital for occupant safety and effective smoke evacuation. This is particularly relevant in areas where air distribution systems are used, ensuring that materials do not contribute excessively to smoke generation during a fire incident. Understanding this standard helps ensure compliance with safety regulations and contributes to better fire safety outcomes in buildings.