What is an Integrity Test?

 In critical rooms (Data Centers, UPS rooms, Server rooms, Electrical rooms with gas suppression), an Integrity Test—also called a Room Integrity Test (RIT) or Door Fan Test—is mandatory to ensure the room can hold fire-suppression gas for the required time.

Practical, site-oriented explanation (fit-out & execution friendly).

1️⃣ What is an Integrity Test?

An Integrity Test checks whether a sealed room can retain clean-agent fire suppression gas (FM-200, Novec-1230, Inergen, etc.) for a minimum hold time, usually 10 minutes.

If the gas leaks out too fast, fire suppression will fail, even if cylinders discharge correctly.

2️⃣ Why is it required? (VERY IMPORTANT)

🔥 Fire Safety

Clean agents extinguish fire by reducing oxygen or heat

If the room is not airtight → gas escapes → fire re-ignites

📜 Code & Compliance

Required by: NFPA 2001

ISO 14520

BSI EN 15004

Local Fire Authority / Client / Insurance

💰 Cost & Liability

Gas cylinders are expensive

Failed test = redo sealing + retest + delay

Without RIT → Fire NOC may get rejected

3️⃣ Where is it mandatory?

✔ Data Centers

✔ Server Rooms

✔ UPS Rooms

✔ Battery Rooms

✔ Electrical Switch Rooms

✔ Any room with Clean Agent Gas Suppression

4️⃣ How is the Integrity Test done? (Step-by-Step)

🔹 Step 1: Room Preparation

All doors, windows, dampers closed

HVAC switched OFF

Cable cut-outs, pipe sleeves, floor void sealed

False floor & ceiling completed

🔹 Step 2: Door Fan Installation

A calibrated fan is mounted on the main door

Door is temporarily sealed using a canvas panel

🔹 Step 3: Pressurization / Depressurization

Fan blows air to create pressure difference

Pressure vs airflow is measured

Software calculates leakage area

🔹 Step 4: Hold Time Calculation

Based on:

Room volume

Leakage rate

Type of gas

Result shows Predicted Gas Retention Time

✅ Pass Criteria: ≥ 10 minutes hold time (typical)

5️⃣ Equipment Used

🛠 Main Equipment

Door Fan Unit (Calibrated)

Digital Pressure Gauges

Laptop with Integrity Test Software

Door Frame Canvas Panel

🧰 Supporting Tools

Smoke pencil / smoke generator (leak detection)

Anemometer (optional)

Measuring tape / laser distance meter

6️⃣ Common Leakage Points (Site Reality)

⚠️ 90% failures come from these:

Under raised floor penetrations

Cable trays entering walls

Unsealed conduits

Door gaps & thresholds

False ceiling cut-outs

AHU dampers not gas-tight

Electrical panel rear opening.

👉 Tip (from execution):

Do a smoke test BEFORE official integrity test.

7️⃣ Integrity Test Checklist (Execution Friendly)

✅ Civil / Interior

[ ] All wall joints sealed

[ ] Skirting sealed (especially recessed skirting)

[ ] Door closers & seals installed

[ ] No cracks in gypsum or blockwork

✅ False Floor

[ ] All pedestal penetrations sealed

[ ] Floor cut-outs fire-stopped

[ ] Epoxy layer completed (where specified)

✅ MEP

[ ] Cable & pipe sleeves sealed with fire stop

[ ] HVAC dampers are gas-tight

[ ] All unused openings sealed

[ ] No open louvers

✅ Fire System

[ ] Gas system installed but NOT discharged

[ ] Pressure relief dampers installed (if required)

[ ] Room volume calculation approved

✅ Documentation

[ ] Approved shop drawings

[ ] Room volume calculation

[ ] Integrity Test Report (Pass)

8️⃣ What Happens if Test Fails?

Leakage points identified using smoke

Seal gaps (fire sealant / foam / epoxy)

Retest after sealing

Sometimes 2–3 rounds required on poor execution sites

9️⃣ Who Conducts the Test?

Specialized Fire System Agencies

Third-party NFPA-certified vendors

Often required in presence of:

Client

Consultant

Fire Officer

0️⃣ Key Advice (Project Manager Perspective)

Plan integrity test after all trades finish

Do NOT rush before handover

Keep 1–2 days buffer for rectification

Coordinate interiors + MEP + fire vendor together