OBO - Fire protection systems (BSS) Nowadays, fire protection presents many planners and installation engineers of building equipment with almost insurmountable obstacles. Installations run like networks through complex building structures. The art of the planner is to harmonise the various networks, such as supply and disposal, heating, ventilation and air-conditioning, with the electrical installation. That in itself is difficult. In addition, the thought of building safety has been at the forefront for several years now. The sensitivity towards fire protection in buildings is growing.