Active fire protection systems are installed based on occupancy and building size. It’s also generally considered best practice to add extra active systems in areas that may contain more sensitive equipment, or that may have a higher than average risk, such as areas with flames or cooking implements.
In comparison, passive fire protection systems contain fires without taking action by utilizing building compartmentalization through the use of fire-resistant walls, doors, and coatings.
Buildings often use both active and passive fire protection systems to gain maximum protection.