The Vulcan Vent is an exterior vent that will prohibit both dangerous embers and fire from entering a structure during a wildfire. Vulcan Soffit and Eave Vents are the first to be accepted in the CBC Ch7A Compliance Policy by the Office of the California State Fire Marshal. Vulcan Vent ® systems resist the intrusion of flame and dangerous flying embers as called for in Chapter 7A of the California Building Code.