Penetrations in exhaust systems must be sealed using what type of devices?

In the context of NFPA 96, penetrations in exhaust systems must be sealed using devices that are specifically listed for such use. This requirement is crucial for maintaining the safety and effectiveness of the ventilation systems in commercial cooking operations. Listed devices have been evaluated and tested for their ability to withstand the specific challenges posed by cooking operations, including high temperatures and the presence of grease-laden vapors.

Using devices listed for sealing ensures compliance with safety standards, which helps prevent the potential for fire spread or system failure. This approach enhances overall fire protection and aligns with best practices for maintaining a safe kitchen environment. By utilizing these approved materials, facilities can minimize risks and ensure their systems operate effectively for the protection of both personnel and property.