Who Provides Room Integrity Testing in New Zealand?
You've had a gaseous fire suppression system installed in your server room, data centre, electrical switchroom, or archive. Before commissioning — and periodically thereafter — the protected enclosure must be tested to confirm it can actually retain the suppression agent long enough to extinguish a fire. That test is called a room integrity test, and finding a qualified provider to carry it out in New Zealand is not straightforward.
This article explains what a room integrity test involves, when it's required, what standards apply in New Zealand, and who is qualified to perform it.
A gaseous suppression system that discharges into a leaky enclosure will fail to maintain the minimum agent concentration for the required hold time — regardless of how well-designed or correctly sized the system is. Room integrity testing is the only way to verify the enclosure will perform as designed.
What Is a Room Integrity Test?
A room integrity test (also called an enclosure integrity test or door fan test) measures the leakage of a protected space to predict how long it will retain a gaseous suppression agent above the minimum design concentration following a discharge. The methodology is similar to a building airtightness test — a calibrated fan is temporarily installed in the doorway or an opening, and the space is pressurised and depressurised to measure air leakage — but the calculation and the pass/fail criteria are specific to suppression system performance, not to energy efficiency.
The result is expressed as a retention time in minutes and seconds at the design agent concentration. If the predicted retention time exceeds the required hold time (typically ten minutes for most gaseous agents), the enclosure passes. If not, the leakage pathways must be identified and sealed before commissioning or re-testing.
How Room Integrity Testing Differs from Building Airtightness Testing
| Characteristic | Room Integrity Test | Building Airtightness Test |
|---|---|---|
| Purpose | Verify suppression agent retention in a protected enclosure | Measure building envelope air permeability for energy/compliance purposes |
| Standard | ISO 14520, NFPA 2001, AS 4214 | ISO 9972 (NZ/AU), ATTMA TS1 |
| Result | Predicted agent retention time (minutes) | Air permeability q₅₀ or n₅₀ at 50 Pa |
| Pass/fail basis | Retention time ≥ required hold time (typically 10 min) | Against programme target (Passive House, Green Star, etc.) |
| Test pressure | Typically up to 60 Pa; curve fitted across multiple pressures | 50 Pa (reference pressure); curve fitted across multiple pressures |
| Enclosure type | Single room or zone within a building | Whole building envelope |
| When required | At commissioning; periodic re-testing as required by standard or insurer | At practical completion; may be required during construction (shakedown) |
The equipment and fundamental methodology overlap — which is why building airtightness testers with the appropriate additional training and accreditation are typically the qualified providers for room integrity testing, rather than fire suppression installers or building inspectors.
When Is Room Integrity Testing Required in New Zealand?
At commissioning of a gaseous suppression system
ISO 14520 (the international standard for gaseous fire suppression systems, adopted in New Zealand) requires that the protected enclosure be tested for integrity prior to or at system commissioning. This is a technical requirement of the standard, not just a best-practice recommendation. A system commissioned without a passing room integrity test does not comply with ISO 14520, regardless of whether it has been correctly designed and installed.
Periodic re-testing
ISO 14520 and NFPA 2001 both require periodic re-testing at intervals no greater than those specified by the standard or the system designer — typically every two to five years, or following any significant building modification that may have affected the protected enclosure. Modifications that trigger re-testing include: penetrations made through walls, floors, or ceilings for cabling or services; replacement of doors, windows, or access panels; HVAC system changes; and any physical alteration to the boundaries of the protected space.
Insurance requirements
Many commercial property insurers in New Zealand require current room integrity test certificates as a condition of coverage for buildings with gaseous suppression systems, particularly for high-value contents such as IT equipment, archive materials, or specialist plant. The test interval required by insurers may be shorter than the standard minimum.
Fit-out and tenancy changes
When a tenancy with a gaseous suppression system changes hands, or when a fit-out modifies the protected space, a fresh room integrity test is typically required to confirm that the enclosure still performs as the system was designed to assume. Even well-intentioned cable management and IT installation work frequently creates unsealed penetrations that compromise retention time.
Which Spaces Typically Require Room Integrity Testing?
Server rooms and data centres
The most common application in NZ. Inert gas and clean agent systems (FM-200, Novec 1230, Inergen) are standard in these spaces. Cable penetrations through raised floors and ceiling voids are the most frequent source of leakage failures.
Electrical switchrooms and UPS rooms
High-value electrical infrastructure protected by clean agent or CO₂ systems. Conduit penetrations and cable trays are common leakage points. These spaces are often smaller and more irregularly shaped than server rooms, which can complicate the test setup.
Archives and library collections
Inert gas systems are preferred where water damage from sprinklers would be catastrophic. Older buildings housing archives often have poor envelope integrity — construction gaps and historic penetrations that make achieving adequate retention time challenging.
Telecommunications exchange rooms
Clean agent systems protecting telecommunications infrastructure. Multiple cable management systems penetrating the envelope are typical, and these are frequently added to over the life of the installation without sealing.
Museum and gallery storage
High-value or irreplaceable collection storage may use gaseous suppression. The standards for retention time and agent concentration are identical to other applications; the consequence of failure is the loss of the collection.
Who Can Perform Room Integrity Testing in New Zealand?
Room integrity testing requires specialist equipment, specific training in the applicable standards (ISO 14520, AS 4214), and the ability to produce a report that documents the test methodology, results, and pass/fail determination in a form acceptable to the system designer, building owner, and insurer.
In New Zealand, qualified room integrity testers are rare. The service sits at the intersection of building physics, fire engineering, and suppression system design — a combination that few practitioners cover. Providers typically fall into two categories:
- Building airtightness testers with room integrity training: Practitioners with ATTMA or equivalent accreditation in building airtightness testing who have extended their scope to include room integrity testing under the relevant fire suppression standards. This is the most common route to qualification, as the core measurement methodology is shared.
- Specialist fire suppression contractors: A small number of suppression system installers in New Zealand have invested in the testing equipment and training to offer room integrity testing as part of their commissioning service. This is more common for large national contractors than for regional installers.
What to look for in a provider: familiarity with ISO 14520 and AS 4214; appropriate testing equipment calibrated to the standard; the ability to produce a compliant test report; and experience with the type of space being tested (a server room with a raised floor and suspended ceiling presents different challenges from a compact switchroom).
BEO Buildingscience provides room integrity testing across New Zealand, drawing on our ATTMA-accredited airtightness testing capability and experience with commercial and specialist enclosures. We cover all major centres and can coordinate test timing with commissioning schedules.
What Happens When a Space Fails?
A failed room integrity test — where predicted retention time falls short of the required hold time — is not an uncommon outcome, particularly in older installations or spaces that have been modified since the last test. The response is leakage detection and sealing, not system replacement.
During or immediately after the fan test, leakage pathways can be identified using smoke pencils or airflow detectors with the enclosure under pressure. The most common failure points in NZ commercial spaces are:
- Unsealed cable and conduit penetrations through floors, walls, and ceiling tiles
- Gaps around raised floor tiles at the enclosure perimeter
- Door seals and door bottom sweeps that have degraded or were never installed to a suppression-rated standard
- HVAC dampers that do not close fully on system activation
- Gaps around light fittings and electrical boxes in the ceiling plane
- Penetrations created during fit-out or cabling works that were not subsequently sealed
Once leakage pathways are sealed — which is typically the responsibility of the building owner or fit-out contractor, not the tester — a retest confirms whether the enclosure now meets the required retention time.
Room Integrity Testing and Airtightness Testing Across New Zealand
BEO Buildingscience provides room integrity testing for gaseous suppression systems and ATTMA-accredited building airtightness testing for commercial and residential projects across New Zealand. If you need a test coordinated around a commissioning programme, or a retest following building modifications, get in touch to discuss timing and scope.
Airtightness & Integrity Testing →