When dealing with the exhaust of corrosive air streams, whether it be in laboratories, pool chemical rooms or Universities, sometimes the corrosive resistant duct itself needs to pass through occupied spaces. This can make the material choice for these types of applications difficult. On one hand, you need a material that can stand up to the harsh chemical airstreams, some that even stainless steel can’t handle, while at the same time this very same duct needs to be rated f