KAISER manufactures the HWD 90 and HWD 68+ fire protection boxes and the FlamoX enclosure system, which restore the fire resistance of F30 to F120 and EI30 to EI90 walls, timber-frame walls and hollow ceilings after electrical installation. The company holds DIBt allgemeine bauaufsichtliche Zulassung Z-19.21-2064 for methods of closing electrical installation openings in fire-resisting elements, and Z-19.21-1788 extending use to timber-frame and timber-panel walls.