A fire riser room is a room in a building where the fire pump and automatic sprinklers are located. The fire riser room also contains the primary water input for the sprinkler system.
There are specific requirements for a fire riser room that are set by the fire department, including that the passageway to the room must be unobstructed. The passageway must also be wide enough that the largest piece of equipment in the room can be removed with ease. Fire riser rooms must have doors, and these doors typically remain locked and closed if the room is not in use.