Can Gas Suppression Hold Time Be Effectively Verified? OKRO Analyzes the Value of Door Fan Test Under the ILAC Accreditation Framework

In high-value asset areas like data centers and semiconductor facilities, the effectiveness of clean agent systems should not rest at the installed level. OKRO emphasizes standardized procedures, controlled equipment, qualified personnel, and traceable records to enhance result credibility.

In high-value asset areas such as data centers, semiconductor facilities, and archive rooms, clean agent fire suppression systems are the last line of defense protecting sensitive equipment and critical data. However, a long-standing debate exists in the industry: can the 'hold time' of a gas suppression system — the duration for which suppression agent concentration is maintained — truly be effectively verified? Some argue that due to the complexity of building structures, no testing method can accurately predict actual suppression agent hold time under real fire conditions. OKRO holds a different view.

Core Challenges of Hold Time Verification

The core challenge of hold time verification lies in the fact that the airtightness of a protected space is affected by numerous factors, including natural leakage through building structures, penetrations for MEP equipment, and door and window sealing performance. The combined effect of these factors makes the actual leakage of a protected space difficult to accurately predict through theoretical calculation alone — it must be quantified through actual testing.

The Scientific Basis of Door Fan Test

The scientific basis of Door Fan Test is built on fluid dynamics principles. By measuring air leakage from the protected space at different pressure differentials, a mathematical relationship between pressure differential and leakage can be established, from which the pressure change curve and concentration decay curve within the protected space after agent release can be derived. This method has been explicitly accepted by international standards including NFPA 2001 and ISO 14520 and is widely applied worldwide.

The Value of the ILAC Accreditation Framework: From Testing to Trust

However, the scientific validity of the testing method is only half the equation. The credibility of test results also depends on the qualifications of the testing body, the calibration status of testing equipment, the professional competence of testing personnel, and the rigor of testing procedures. This is precisely the core value of the ILAC accreditation framework: through systematic review of the testing body's independence, technical competence, and quality management system, it ensures that test results are traceable, repeatable, and trustworthy.

OKRO's Professional Commitment

OKRO holds ILAC-accredited airtightness testing inspection qualifications and strictly adheres to four principles when conducting Door Fan Tests: using professionally calibrated testing equipment; having tests executed by professionally trained and certified personnel; operating in accordance with procedures specified in NFPA 2001 and other standards; and issuing formal inspection reports containing complete test data, calculation processes, and conclusions.

Hold time can be verified — provided the testing body possesses sufficient professional qualifications and independence. OKRO's ILAC accreditation is powerful proof of this prerequisite.

For owners of high-value asset areas, choosing an ILAC-accredited body to conduct Door Fan Tests is not only a responsible verification of suppression system effectiveness — it is also a strategic choice for having credible evidence in insurance underwriting, regulatory reviews, and commercial compliance.