Door manufacturer at Arth holding 90 live VKF recognitions spread across more families than any other Swiss holder: Brandschutztüren (34), Brandschutztüren mit Verglasung (33), Rauchschutzabschlüsse (7), Brandschutztore (5), Brandschutztore mit Verglasung (5) and vertical fire-rated glazing (6). Its Ei30 door, AluHartdeck and IsoHT ranges are published against the register with per-product VKF numbers.