Automatic release shall be permitted for any space of 6000 ft3 or less.

• A. Automatic release shall be permitted for spaces greater than 6000 ft3
• B. Automatic release shall be permitted for any space of 6000 ft3 or less
• C. Automatic release shall never be permitted
• D. Automatic release is optional

Answer: (B)

Volume-based permissibility for automatic release in clean agent systems. In NFPA 2001, automatic release is allowed in small enclosures where the space volume is 6000 cubic feet or less. This threshold supports rapid fire control while keeping agent concentrations manageable and safety measures active, assuming detectors and alarms are properly in place to ensure a controlled release. For larger spaces, automatic release is not typically permitted without additional controls or a manual/supervisory release to protect occupants and allow evacuation. So, stating that automatic release shall be permitted for any space of 6000 ft3 or less reflects the standard’s volume-based provision. The other options either extend automatic release to larger spaces, deny it entirely, or deem it optional, which does not align with this rule.