What duration is specified for a nitrogen-driven pressure tank in NFPA 13D for residential use?

In NFPA 13D, which governs the installation of sprinkler systems in residential settings, the specified duration for a nitrogen-driven pressure tank is indeed 10 minutes. This duration is crucial as it ensures that the system can maintain adequate pressure and deliver water effectively during the initial moments of a fire, which is critical for life safety and property protection.

The 10-minute requirement is designed to provide enough time for the sprinkler system to function until the water supply can fully engage or until the fire is under control. It balances efficiency and effectiveness, allowing the system to operate properly without overwhelming the supply system. Understanding this specification is essential for proper system design and compliance with fire safety regulations.