Enclosure Integrity Test measures and verifies the enclosure integrity performance of protected areas to ensure the extinguishing effectiveness of gaseous fire suppression systems. Gaseous extinguishing agents must maintain design concentration for a specified Retention Time to achieve suppression effectiveness, which requires that enclosure leakage be managed below allowable limits.
The test is conducted using Door Fan Test equipment in accordance with methods specified in international standards including NFPA 2001, ISO 14520, and EN 15004. A blower is installed at the protected area doorway to create a pressure differential between the interior and exterior of the space, and leakage rates are measured based on pressure variations. Using the measured data, Equivalent Leakage Area (ELA), Predicted Retention Time, and additional agent requirements are calculated to evaluate enclosure integrity adequacy.
If test results indicate excessive leakage, leakage paths are identified and locations requiring remediation are determined, including wall penetrations, door gaps, ceiling and floor openings, and pipe and cable penetrations, with improvement recommendations provided. Final adequacy is confirmed through retesting after integrity improvements.
This test is mandatory for Clean Agent Systems in accordance with NFPA 2001, and is also frequently performed prior to Full Discharge Test for CO₂ Suppression Systems (following NFPA 12) depending on project requirements to verify system reliability. It serves as a particularly important verification procedure in unmanned environments or high-value asset protection facilities such as data centers, server rooms, electrical rooms, and telecommunications equipment rooms.
We provide comprehensive services including test execution, result analysis, integrity improvement recommendations, and retesting.