Room Integrity Testing NZ — BEO Science
BEO Science — Specialist Testing Services

Room integrity testing —
fire suppression agent retention in NZ

Pressure-based room integrity testing to ISO 14520 for gaseous fire suppression systems — predicting how long a clean agent or inert gas will remain at effective concentration in a protected enclosure. Data centres, server rooms, archives, laboratories, and plant rooms across NZ.

ISO 14520 Clean Agent Systems Inert Gas Systems ATTMA Certified NZ — All Regions
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What Room Integrity Testing Is

A fire suppression system is only effective if the agent stays in the room long enough to work

Gaseous fire suppression systems — FM-200, Novec 1230, CO2, inert gas blends — work by flooding an enclosure with suppressant agent and holding it at effective concentration while the fire is extinguished. The design assumption is that the agent stays above the minimum design concentration for a specified retention time — typically ten minutes at the protected height.

Room integrity testing measures the actual leakage characteristics of the enclosure under pressure and calculates the predicted agent retention time. If the room leaks too quickly, the suppressant dissipates before it can work — and the system fails at the moment it's needed most. A room integrity test is the only way to verify that the enclosure will actually hold the agent for the required duration.

Required at commissioning — and periodically thereafter

ISO 14520 and NZS 4541 require room integrity testing at system commissioning. Most insurance and compliance frameworks also require periodic retesting — typically every two years — to confirm the enclosure hasn't degraded through modifications, cable penetrations, or general wear.

Construction changes invalidate previous test results

Any modification to the protected enclosure — new cable penetrations, replaced door seals, HVAC modifications, partition changes — can alter the leakage characteristics. A previous pass result does not remain valid after construction changes.

Failing a test before discharge is far cheaper than after

A room that fails a pre-commissioning integrity test can have its leakage points identified and sealed before the system is charged. A system that discharges into a room with insufficient integrity wastes expensive suppressant and may not extinguish the fire.

Insurance and compliance requirements

Many facility insurance policies and compliance frameworks — including those covering data centres, telecom facilities, and archival storage — require documented room integrity test results. An untested room may not satisfy the conditions of the suppression system warranty or the facility insurance policy.

Who Needs It

Protected enclosures requiring room integrity testing

Any space protected by a gaseous fire suppression system requires room integrity testing. The enclosure type determines the agent selection and design concentration — the integrity test verifies the room will hold that agent for the required retention time.

Data Centres & Server Rooms
The most common application. Clean agent systems (FM-200, Novec 1230) protect IT equipment without water damage. Server rooms accumulate cable penetrations over time — retesting confirms integrity is maintained as the room evolves.
  • Commissioning test at system installation
  • Periodic retest — typically every two years
  • Post-modification test after cable or HVAC changes
Telecom Switch Rooms
Telecommunications switching and routing equipment carries the same suppression requirements as data centres — and the same vulnerability to cable penetration accumulation over the facility lifecycle.
  • ISO 14520 compliant test and report
  • Agent retention time calculation
  • Leakage point identification where required
Archives & Libraries
Irreplaceable documents, artworks, and archival collections require suppression systems that won't cause water damage. Inert gas systems are common. Agent retention time is critical — the contents cannot be replaced if suppression fails.
  • Inert gas system integrity testing
  • Conservation-sensitive environments
  • Compliance with insurance requirements for archival facilities
Laboratories & Plant Rooms
Chemical storage areas, process equipment rooms, and specialist laboratory spaces with gaseous suppression systems require the same commissioning and periodic testing regime.
  • All gaseous agent types — FM-200, Novec, CO2, inert blends
  • Hazardous area considerations where applicable
  • Compliance documentation for facility audits
How We Test

The test process — from enclosure check to retention time calculation

01
Enclosure check and pre-test preparation
Before the formal test, we carry out an enclosure check — a visual survey of all penetrations, door seals, wall joints, cable entries, and duct terminations. We identify any obvious leakage paths that are likely to cause a test failure and can advise on sealing prior to the formal test. Intentional openings (ventilation dampers, HVAC connections) are temporarily sealed as specified by the system design. We recommend an enclosure check early in the commissioning phase to avoid remedial work under programme pressure.
02
Pressure test — blower door fan method
The room is pressurised and depressurised using a calibrated blower door fan system installed in the primary access door. Airflow rates at multiple pressure differentials are recorded. This data characterises the leakage area of the enclosure — the effective aperture through which air (and therefore suppressant agent) can escape.
03
Agent retention time calculation
The measured leakage area is used to calculate the predicted agent retention time using the method specified in ISO 14520 (or the applicable standard for the agent type). The calculation accounts for the agent density, design concentration, enclosure volume, and the leakage characteristics measured in the pressure test. The result is the predicted time the agent will remain above the minimum design concentration at the protected height.
04
Leakage identification (where required)
If the enclosure fails the retention time requirement, or where the client requests it, we can carry out leakage identification under pressurisation — using smoke or tracer techniques to locate and document specific leakage points. This provides the remediation contractor with a clear scope of sealing work required before the formal retest.
05
Report and compliance documentation
Results are documented in a formal test report covering: test method and standard, equipment calibration, measured leakage area, calculated retention time, pass/fail assessment against the design requirement, and a summary of any identified leakage points. The report is structured for submission to the fire protection engineer, facility manager, insurer, and compliance authority as required.
What you receive
  • Formal test report to ISO 14520 — calibrated equipment, documented method
  • Measured equivalent leakage area (ELA) for the enclosure
  • Calculated agent retention time — pass or fail against design requirement
  • Leakage point schedule (where identification is included or required)
  • Compliance documentation suitable for fire protection engineer, insurer, and authority submission
  • Retest report where remediation has been carried out
FAQ

Common questions

How often does a room integrity test need to be repeated?
ISO 14520 requires testing at commissioning. Most compliance frameworks, insurance policies, and suppression system maintenance contracts require periodic retesting — typically every two years. Any modification to the protected enclosure (new penetrations, door replacement, HVAC changes) should trigger a retest regardless of when the last test was carried out, as the modification may have altered the leakage characteristics of the room.
What happens if the room fails the test?
A fail result means the calculated agent retention time is below the minimum requirement — the suppression system cannot be relied upon to maintain effective concentration for the required duration. We provide a leakage identification service to locate and document specific leakage points, giving the remediation contractor a clear scope of sealing work. Once sealing is complete, a retest confirms whether the enclosure now meets the requirement.
What standard does the test follow?
Testing follows ISO 14520 (Gaseous fire-extinguishing systems) and the pressure test methodology consistent with ISO 9972. For specific agent types, the applicable standard for that agent system also applies — for example, FM-200 systems are typically designed and tested to NFPA 2001 as well as ISO 14520. We can confirm the applicable standard for your specific system before the test.
Do we need to shut down equipment during the test?
In most cases, no — the pressure test itself doesn't require equipment shutdown. However, the suppression system control panel should be isolated or placed in test mode to prevent accidental discharge during the test. We coordinate with the facility manager and fire protection contractor to confirm isolation requirements before the test day.
Is room integrity testing the same as blower door testing for buildings?
The equipment and test principle are similar — both use a calibrated fan to pressurise an enclosure and measure leakage. However, the purpose and the metric are different. Building airtightness testing (blower door) measures air changes per hour at 50 Pa for energy performance. Room integrity testing measures equivalent leakage area and calculates agent retention time for fire suppression compliance. We carry out both — see our airtightness testing service for building envelope testing.
Book a room integrity test across NZ
Queenstown · Christchurch · Wellington · Auckland · travel to other regions by arrangement. Contact us to confirm availability and get a fixed quote for your enclosure.
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denise@beoscience.com · +64 210 239 4980 · beoscience.com