I have an exhaust system serving a welding and metal fabrication lab at a school. They will utilize 70% ferrous metal and the remaining will be a mixture of stainless steel, coated steel and aluminum.
The largest duct diameter at the building exit is 30" round. The dust collector will be located on the exterior of the building and in a freezing environment.
Will I need to provide fire suppression within the ductwork both inside and outside as well as within the dust collector?
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