The sprinkler nozzles are fitted in a grid under the ceiling and sealed with a glass bulb or fusible link (a heat-sensitive element) that breaks at a particular temperature, releasing water to combat the fire. Sprinkler nozzles come in various shapes and sizes, to suit the most diverse conditions. The water is delivered by means of pumps and motors from the water main, water tanks or open water. There are various design standards for sprinkler systems.

An active extinguishing system means fire is usually limited to one room, making evacuation easier. With safe access, the fire brigade can easily fight the fire from inside the building with a smaller team and, where necessary, perform further extinguishing actions. Because a limited in-house emergency organisation and appropriate evacuation strategy are often sufficient, you can save money. The investment in architectural compartments and their maintenance is also limited.