İkitelli City Hospital — FM200 Gas Suppression Project

City hospitals are vast, mission-critical buildings that cannot be protected by a single fire scenario. Under one roof they combine intensive-care units, operating theatres, data centres holding millions of records, medical-imaging equipment, and UPS and power-distribution rooms that keep everything running. In some of these spaces, water would extinguish the fire while endangering both the patient and expensive equipment.

On the İkitelli City Hospital project, A-Pro Engineering took responsibility for protecting exactly these sensitive areas: across a facility built on 1,000,000 m², roughly 160 critical spaces were protected turnkey with FM200 (HFC-227ea) clean-agent suppression, including electro-mechanical infrastructure works.

Why Clean Agent, Not Water?

Across the hospital, sprinklers and wet systems protect the majority of occupied areas. But in certain spaces water is not the solution — it is a new problem:

• Data and server rooms — water permanently destroys the hardware that holds all patient records and hospital automation.
• Medical-imaging (MRI/CT) control and technical rooms — multi-million-lira devices are highly sensitive to water and moisture.
• UPS and battery rooms, main electrical distribution boards — in these power-continuity spaces water is both ineffective for suppression and an electrical hazard.

In these areas clean-agent suppression stops the fire without residue, without electrical conductivity and within seconds — protecting both the equipment and process continuity.

Why FM200 (HFC-227ea)?

FM200 is an NFPA 2001 clean agent. It stops fire by rapidly absorbing heat and breaking the chemical chain reaction, without lowering oxygen to dangerous levels. Its key strengths:

• Fast discharge — typically reaches design concentration within 10 seconds, tackling the fire early.
• Occupied-space safety — the design concentration is kept within the safety threshold (NOAEL) for safe use during evacuation.
• Residue-free — no post-discharge residue, corrosion or clean-up burden; the space can be returned to service quickly.
• Compact storage — the agent is stored as a liquid in pressurised cylinders, suitable for tight technical spaces.

Agent quantity and cylinder banks were sized per space, evaluating volume, enclosure integrity and hazard class individually.

Scope: ~160 Critical Spaces

Each of the roughly 160 spaces was treated as an independent suppression scenario. For every enclosure:

• net volume and leakage areas were determined,
• the required agent quantity was calculated to NFPA 2001,
• the cylinder bank, discharge nozzles and pipework were sized,
• a detection and discharge scenario was designed specific to the space.

Turnkey Electro-Mechanical Delivery

A-Pro Engineering carried the project not merely as a gas-system supplier, but turnkey:

1. Engineering design — per-space calculation, layout and discharge design.
2. Procurement — agent, cylinder banks, nozzles, detection and control panels.
3. Electro-mechanical works — pipework, support systems, electrical and control wiring.
4. Installation — cylinder banks, nozzles and detection equipment in each space.
5. Testing and commissioning — room-integrity, functional and scenario tests.

Detection, Discharge and Commissioning

To trigger suppression at the right moment, each protected space was designed with cross-zoned detection: suppression only activates once mutually confirming detectors verify the fire, preventing accidental discharge. Audible-visual alarms, a pre-discharge delay and manual release/abort stations were integrated for personnel safety and space management. During commissioning, room-integrity (enclosure) tests verified the agent’s required hold time.

Outcome

At İkitelli City Hospital, critical spaces where water would create risk were secured with FM200 clean-agent suppression — from design to commissioning, delivered from a single source. The project reflects A-Pro Engineering’s experience with gas suppression at city-hospital scale (including Elazığ City Hospital): applying the right agent, in the right space, to code, in high-volume, multi-space facilities that demand uninterrupted operation.