What type of system is primarily used to control fires inside buildings?

The type of system primarily used to control fires inside buildings is a standpipe and sprinkler system. These systems play a crucial role in fire protection and are designed specifically for firefighting and suppression within structures.

Standpipe systems consist of piping that provides water outlets for firefighters on each floor of a building, allowing them to quickly access water to combat fires. Meanwhile, sprinkler systems automatically release water when they detect heat from a fire, helping to control or extinguish flames and prevent the spread of fire until professional fire services can respond.

This combination of standpipes and sprinklers is effective because it provides an immediate response to fire incidents, significantly enhancing the safety of both occupants and the structure itself. Other systems may serve important roles in fire detection or advanced monitoring, but the primary function of controlling fires is best achieved through these established suppression systems.