Even when pre-engineered systems permit special features, which overarching principle applies to all clean agent systems?

• A. All requirements of the standard shall apply
• B. Only the listed features apply
• C. No standard requirements apply
• D. They are exempt from testing

Answer: (B)

Only the features that are explicitly listed for a given clean agent system are permitted. Pre-engineered packages are designed around a defined set of features that have been tested and approved for that configuration, so the system’s performance, release timing, and safety guarantees rely on those listed capabilities. If you need a feature beyond what the listing includes, you must seek engineering approval or use a different system, because unlisted features have not been evaluated for that setup. While general design, installation, and testing requirements still apply, the actual features you can rely on in a pre-engineered kit are restricted to those in the listing.