Which item is typically not part of NFPA 2001 installation documentation?

• A. Design calculations
• B. Vendor invoices
• C. System drawings
• D. Commissioning reports

Answer: (B)

Installation documentation is about proving the system was properly designed, installed, and verified to meet performance requirements. The typical items included are design calculations that show how the agent quantity and distribution were determined, and how the system will achieve the required hold times and concentrations; system drawings that depict the piping, components, and layout to confirm everything is positioned and connected correctly; and commissioning reports that document the actual tests and verifications performed to ensure the system operates as intended (controls, alarms, agent discharge, recharge procedures, etc.).

Vendor invoices, while important for procurement and financial records, do not demonstrate the system’s design integrity or successful operation. They don’t provide evidence that the installation meets NFPA 2001 performance criteria, which is why they are not typically part of the installation documentation package.