Materials Used in Kitchen Exhaust Duct Systems

​Commercial kitchens require exhaust duct systems. The systems provide ventilation and proper and constant airflow, keeping the air in an enclosed and often smoky space clean and safe. Since the systems provide a vital function, the materials must meet code standards.

The two primary code-compliant materials used in commercial exhaust duct systems are 18-gauge stainless steel and 16-gauge carbon steel. Made from basic carbon and iron steel, the latter can withstand high temperatures and various stresses. With stainless steel, adding at least 10 percent chromium to the alloy helps prevent rusting and corrosion in oxygenated environments.

Fire codes generally mandate welded joints for exhaust hoods, which provides protection should a fire break out. Beyond its noncorrosive properties, stainless steel can prevent bacteria from building up in the welds and highly recommended in food processing environments.

With commercial systems, ducted hoods employ a fan and an external vent to suck up fumes and smoke associated with kitchen activities. Then, the exhaust exits the space via the ductwork.

Vamco Sheet Metal Inc, IndustryTopics

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