Are stainless steel ducts required to have an additional protective coating?

Stainless steel ducts are generally recognized for their corrosion resistance and durability, which is a key advantage when used in the context of commercial cooking operations. According to NFPA 96, stainless steel is often deemed sufficient for ventilation systems due to its ability to withstand the high temperatures and moisture commonly found in cooking environments.

As a result, stainless steel ducts do not require an additional protective coating in most circumstances, making them exempt from such requirements. This is why the assertion that they are exempt aligns with the standards set forth; the inherent properties of stainless steel provide adequate protection without the need for extra coatings, provided that the ducts are installed and maintained correctly.

When considering various installation contexts or environmental factors, the robust nature of stainless steel typically makes additional protective measures unnecessary unless specific conditions warrant different materials or protective measures, such as extreme weather or corrosive environments.