What type of power should smoke control systems be supplied with?

Smoke control systems are vital for maintaining the safety of building occupants during a fire by managing smoke movement and ensuring clear evacuation routes. The ideal power supply for these systems must ensure they remain operational in the event of a power failure.

The correct choice is standby power. Standby power refers to a backup source of energy that kicks in when the primary power source is unavailable. This ensures that the smoke control system can function effectively even in emergencies, such as a power outage caused by the fire itself. Standby power is designed to provide reliable operation during critical conditions, ensuring that smoke control measures can be executed as intended.

The choice of other power types, such as primary power, would not guarantee operation during a power outage, as it implies the system relies solely on the main power supply. Backup power typically refers to auxiliary power sources that may not activate automatically, and emergency power often refers to systems designed for immediate operational requirements, which may not suffice for longer-lasting situations like smoke control in a sustained emergency. Therefore, standby power is the most reliable option for smoke control systems to ensure continuous operation when needed most.