Bad Vöslau manufacturer of fire-protection systems holding nine live VKF recognitions — three in Untergruppe 223 Abschottungen/Durchführungen and six in 261 Baukonstruktionen und Bausysteme. The second family is the interesting one: those are whole certified constructions rather than single seals, so its evidence covers the compartment as built rather than one penetration in it. It is the only Austrian holder in the register whose name and whole business are fire-protection systems.