Author: Ir. Dr. Justin LAI Woon Fatt | 23 February, 2026

INTRODUCTION

Carbon dioxide (CO2) extinguishing system comprise of CO2 cylinders, steel piping, discharge nozzles, heat and/or smoke detectors, and a control panel that monitors the protected area and activates both visual and audible alarms prior to gas discharge. When a fire is detected, CO2 is discharged after a time delay to alert any occupants to evacuate the room. CO2 extinguishing systems are typically provided for electrical transformer rooms, switch rooms, and standby generator rooms. In addition, a CO2 extinguishing system should not be installed in normally occupied rooms.

Figure 1: Carbon Dioxide Fire Extinguishing System Typical Arrangement Drawing [1]

CO2 FIRE EXTINGUISHING SYSTEM DESIGN

The Uniform Building By-Law 235 1984 (Amendment 2021), states that fixed extinguishing systems shall either be total flooding system, or local application systems, depending on the nature of the hazard, process, and occupancy, as required and approved by the Director General (DG) of the Fire and Rescue Department of Malaysia (FRDM). The applicable standards for CO2 extinguishing systems are NFPA 12 and MS 1590 [1].

The CO2 extinguishing system is designed to achieve a 50% flame-extinguishing concentration of CO2 at 21 °C. CO2 should discharge fully under 1 minute for surface fires. For deep-seated fires, the total discharge shall not exceed 7 minutes or 30% concentration discharge within 2 minutes [1]. A 40% increase in design quantity of CO2 is required for local applications using high-pressure storage, as only the liquid portion of the discharge is effective [1]. The CO2 extinguishing system shall be based on total flooding principle and/or local application with time delay period of 30 seconds, adjustable up to 60 seconds maximum [1]. All components must be located, installed or protected from mechanical, chemical or other damage, while all devices for shutting down supplementary equipment shall be integrated with system and function with system operation [1].

The CO2 system is powered by a 240 V AC, 50 Hz mains supply, in addition, the control panel charges a 24 V DC standby maintenance-free battery for automatic backup during outages / main power supply failure, and provides visual and audible fault indications [1]. The standby battery shall be trickle charged in normal operation. In addition, the area shall be protected with two or more heat or smoke detectors, and activation of the detectors shall be indicated through illumination of indicator light and audible warning sound. At least two of detector zones must be activated in order for the system to discharge CO2 automatically. Meanwhile, manual activation of CO2 system shall be provided through a “break glass” handle type manual pull box, mounted outside the exit door to protected space. With regards to maintenance, the detector wiring shall be continuously supervised, with faults and disconnections in the wiring / circuit indicated by a panel / fault lamp and a buzzer.

STORAGE AND COMPONENTS

A CO2 extinguishing system is designed to hold liquefied CO2 at ambient temperatures in either low-pressure (2068 kPa, refrigerated, liquefied form) or high-pressure (5171 kPa, ambient temperatures) cylinders, with high-pressure [1]. Typically, ambient temperature storage is often preferred for cost efficiency, as it is mostly impractical to have an additional refrigeration system in place, which adds an additional maintenance item to be monitored. Cylinders shall be rated at 59 bar (at 21 °C), tested to 228 bar pressure, must have quantity indicators, permanent labels (which specifies number, filling weight and pressurisation level of cylinder), and be uniform in size if distributed by the same manifold [1]. In addition, in systems where more than three cylinders are required, a pilot cylinder shall be provided to activate the discharge from each cylinder. Each is equipped with a solenoid-operated discharge valve to discharge CO2 at required rate, with internal dip tubes extending to the bottom of the cylinder to permit discharge of liquid CO2, for containers with top-mounted valves. Furthermore, cylinders should be located outside the hazard area with adequate protection against vandalism.

A control panel shall display system status, hazards, faults, and provides alarms for discharge, pre-discharge, and fault conditions, alongside device for shutting down exhaust fans and activating solenoid powered curtains, in addition to complying with MS 1404 [1]. Alarms indicating failure of supervised devices should be distinct from alarms indicating operation of the system, or hazardous conditions. In addition, a discharge pipe pressure switch shall be provided to provide signal back to the control panel, that the CO2 gas has been discharged.

On the other hand, CO2 discharge nozzles must meet minimum discharge pressures, be corrosion-resistant, and be clearly marked for identification and display equivalent orifice diameter, regardless of shape and quantity and nozzles. Discharge nozzles shall be consist of the orifice and any associated horn, shield or baffle. Nozzle pressure should be 1034 kPa for low-pressure storage, while for high-pressure storage, nozzle pressure should be 2068 kPa [1]. Furthermore, for areas with high-risk of debris clogging or high dust environment, discharge nozzles should also contain frangible discs or blow-out caps to prevent clogging by foreign elements.

Automatic detection and alarm bells should be triggered by corrosion-resistant heat or smoke detectors, with alarms producing at least 65 dB or 5 dB above the ambient sound level, whichever is higher, powered by the fire alarm battery [1]. In addition, the bell should be of trembling type, and not single-stroke type. Meanwhile, the CO2 piping and fittings should be made of non-combusting material, have the ability to maintain its own shape during the outbreak of fire, and be compliant with API Schedule 40 steel for low pressure storage systems. On the other hand, for high-pressure CO2 system, the CO2 piping system should be compliant with Schedule 40 for pipes with 20mm diameter and below, while for pipes with 25mm diameter and above, the pipes should be compliant with Schedule 80 [1]. Flexible piping, tubing or hoses (including connections) utilised should be able to withstand the rated pressure of the system. Furthermore, warning signs are required at all entrances and within protected areas at prominent and highly visible locations.

APPLICATIONS

CO2 fire extinguishing systems are widely used for their rapid action, residue-free results, and highly effective fire suppression capabilities where other fire suppression methods may result in water, chemical or residue damage. Key applications of CO2 fire extinguishing systems include [2]:

1. 1. Sensitive environments – Data centres, archives, and museums where equipment, documents, and artefacts require protection from water or chemical damage.
   2. Industrial facilities – Areas handling flammable materials, hazardous goods warehouses, turbines, transformers, and specialised metal processing systems.
   3. Marine industry – Ship engine rooms and offshore platforms, where confined spaces require effective, non-water-based suppression.
   4. Power generation – Electrical cabinets, rooms, generators, and substations to ensure uninterrupted power supply and prevent secondary damage.
   5. High-risk zones – Paint booths, powder-coating rooms, hydraulic systems, cable shafts, silos, dust filters, and printing machinery.

SAFETY PRECAUTIONS

CO2 fire extinguishing systems require strict safety measures to protect both people and property. Since CO2 suppresses fire by reducing oxygen levels, accidental exposure in confined spaces can lead to serious health risks, such as unconsciousness and asphyxiation, which can even lead to fatalities [3]. To prevent this, CO2 fire extinguishing systems should be equipped with alarms, time delays, and clear evacuation protocols to ensure all personnel exit before discharge.

Access to protected zones must be restricted during discharge, and only trained personnel should operate the system, or supervise re-entry. Routine inspection and maintenance of cylinders, valves, detectors, and piping are essential for reliable performance. After activation, ensure proper ventilation to remove residual CO2 before re-entry. Warning signs and safety notices must be prominently displayed to highlight potential hazards.

CONCLUSION

In summary, a CO2 extinguishing system offers a fast, effective, and residue-free method of fire suppression, making them ideal for safeguarding sensitive equipment, critical infrastructure, and high-risk industrial environments. Their ability to suppress fires rapidly without causing water damage helps preserve valuable assets and minimise operational downtime. However, because CO2 works by displacing oxygen, strict safety protocols, proper system design, and regular maintenance are essential to ensure both system effectiveness and occupant safety.

Ir. Dr. Justin LAI Woon Fatt
CEO/ Founder
IPM Group

Author: Ir. Dr. Justin LAI Woon Fatt | 26 January, 2026

INTRODUCTION

Automatic fire sprinkler systems are among the most reliable and effective methods of fire protection in buildings. These systems operate without human intervention, detecting and controlling fires at an early stage to prevent spread and reduce damage. At the heart of the system are storage tanks, control valve sets, sprinkler heads, flow switches, pressure switches, pipework, and pumps, which work together to ensure water is delivered where it is needed during an emergency.

TYPES OF SPRINKLER INSTALLATIONS

There are four main types of sprinkler systems, each designed for different conditions:

• • Wet Pipe System: The most common type. Pipes are permanently filled with water, ready to discharge instantly when a sprinkler head activates.
  • Dry Pipe System: Pipes are filled with pressurised air. When heat breaks a sprinkler bulb, air escapes, allowing water to flow into the pipes and discharge through the sprinkler head.
  • Pre-Action System: Similar to dry pipe but requires a separate detection system (smoke or heat detectors) to open a valve before water enters the pipes. Water is released only if a sprinkler head is activated.
  • Deluge System: Sprinkler heads have no bulbs and remain open nozzles. When triggered by a detection system, water is discharged from all heads simultaneously, ideal for high-hazard areas.

Sprinklers installed more than 17 metres above the floor are classified as ineffective. In such cases, early response heads, large droplet sprinklers, or deluge systems shall be proposed to meet the safety objectives [1]. However, the overall design shall depend on ceiling height, storage height (racking), and sprinkler head type.

Figure 1: Automatic Sprinkler System [2]

DESIGN STANDARDS AND HAZARD CLASSIFICATIONS

In Malaysia, sprinkler systems must comply with the UBBL 1984 (Amendment 2021) By-law 228 and MS 1910 for design, installation, and maintenance [1]. Other international standards such as NFPA 13 or Factory Mutual (FM) standards, may be accepted with prior approval. Sprinkler systems are designed based on hazard classifications [1]:

• • Light Hazard: Low fire load, such as schools, offices, prisons.
  • Ordinary Hazard (OH): Commercial or industrial premises with moderate combustibility. Subdivided from OH1 (restaurants, hotels) to OH4 (match factories, film studios) – depending on fire load and combustibility.
  • High Hazard: High fire loads or flammable liquids, further divided into process and storage risks.

SPRINKLER PUMPS AND TANKS

Sprinkler pumps draw water from dedicated storage tanks to feed the system. Typically, there are two main pumps (one duty and one standby) and a jockey pump to maintain pressure. Pump capacity depends on building height and hazard classification, with specific flow and pressure requirements. Standby pumps should be powered by an emergency generator or diesel engine, with sufficient fuel to sustain continuous full-load operation for a minimum of 4 hours (for Ordinary Hazard) and 6 hours (for High Hazard) [1].

Sprinkler tanks must have a minimum effective capacity based on hazard class and the height difference between the highest and lowest sprinklers. Tanks may be steel, fibre-reinforced polyester (FRP), or concrete, and should be corrosion-protected, compartmented, and clearly marked as fire tanks. In addition, dedicated ball float valves, overflow pipes, drain pipes and water level indicators should be provided for individual compartments. Furthermore, a sprinkler tank should be standalone and not combined with a hose reel tank.

CONTROL VALVES, SWITCHES, AND PIPEWORK

Each sprinkler installation includes a control valve set, comprising stop valves, alarm valves, drains, flow gauges, and pressure gauges. Flow switches are installed above control valves to detect water movement and trigger alarms. For systems sub-divided by zones, each floor should be designated as one or more zone, and flow switches must be provided for distribution pipes to each zone, which provides water flow indication for the specific zone.

Sprinkler pipework shall be black steel or galvanised iron (BS 1387) Class B minimum and properly joined according to pipe sizes, using screw joints (for pipe sizes 80mm and below), welded (for pipe sizes 100mm and above), or mechanically grooved couplings (for all pipe sizes up to 250mm) [1]. Underground pipework should be heavy gauge of Class C for durability. All pipes should be visible and not buried (embedded) in concrete slabs. In addition, all pipes shall be painted in red gloss paint or otherwise identified with red bands of 100 mm width minimum at elbows and tees.

SPRINKLER HEADS

Sprinkler heads are typically pendent or upright, with temperature ratings at least 30°C above the maximum ambient temperature, typically resulting in a nominal rating of 68°C, while kitchen areas require a higher ratings of 79°C [1]. Quick response sprinkler shall be utilized for life safety systems. The maximum spacing and coverage of sprinkler heads depends on the hazard level [1]:

• • Light Hazard: Up to 21 m² per head (max 4.6 m apart)
  • Ordinary Hazard: Up to 12 m² per head (max 4 m apart)
  • High Hazard: Up to 9 m² per head (max 3.7 m apart)

Areas such as staircases, electrical rooms, and small toilets may be exempt from sprinkler head requirement, subject to hazard assessment and approval of the Fire and Rescue Department of Malaysia (FRDM). Sprinkler heads shall be installed in concealed ceiling or floor voids of a building if the height is more than 800 mm, or if the space contains combustible materials or is constructed of combustible materials [1]. Additionally, the working pressure in the sprinkler heads should not exceed 12 bars, particularly for high-rise buildings [1].

TESTING AND MAINTENANCE

Sprinkler systems require regular inspection, pressure testing, and functional checks to ensure reliability of opera. Before commencement of testing, the riser shall be flushed to clear all debris from the inside of the riser. A static pressure test is performed for 24 hours at 14 bars or 150% of the working pressure (whichever is higher) to check for leaks at joints and landing valves [1]. Flow test should be conducted at each zone by opening the isolation valve to trigger the fire alarm panel. Additionally, the pump delivery branch and installation control valve drain line are used to verify that flow rates meet design specifications. Routine maintenance of checking valves, heads, pipework, and switches ensures the system remains fully operational.

CONCLUSION

An automatic sprinkler system is a vital, autonomous fire protection measure that detects and controls fires quickly and reliably. Its effectiveness depends on proper design, installation, and maintenance in accordance with Malaysian standards, specifically UBBL 1984 (Amendment 2021) and MS 1910. Each component, from pumps and tanks to valves and sprinkler heads shall be validated through rigorous testing to ensure water is delivered where it is needed during a fire emergency. With regular testing and upkeep, these systems provide essential, life-saving protection for both people and property.

Ir. Dr. Justin LAI Woon Fatt
CEO/ Founder
IPM Group

Author: Ir. Dr. Justin LAI Woon Fatt | 30 December, 2025

INTRODUCTION

A fire detection and alarm system comprises multiple devices that collaborate to detect and alert individuals by visual and auditory signals in the presence of smoke, fire, carbon monoxide, or other problems. Fire alarms can be activated automatically by fire detection system such as smoke, heat and flame detectors, or manually through manual call points or pull stations. Devices for manual fire alarm activation are installed in locations that are easily accessible (near the exits), clearly identified, and operable. Early identification not only aids in the prevention of fire spread but also allows firefighting officials to respond more quickly. This prompt intervention minimises potential damage to the structure and its contents, reducing the financial and emotional toll on property owners.

THE SIGNIFICANCE OF FIRE DETECTION AND ALARM SYSTEMS

Malaysia has witnessed disastrous fires resulting in loss of life and property damage. Fire detection and alarm systems are now a critical component of the country’s safety infrastructure to mitigate these hazards. These systems are designed to detect fires early, triggering alerts for occupants and authorities to allow for timely evacuation and response. They serve a variety of purposes, including:

• • Early Detection: Sensors identify heat, smoke, or flames at the incipient stage of a fire.
  • Notification: The system activates sirens, strobe lights, or voice announcements to alert occupants to the hazard.
  • Automatic Suppression Activation: Depending on system type, fire suppression may be activated either independently by heat (e.g. sprinklers) or triggered through the fire alarm system (e.g. gas suppression or pre-action systems).
  • Communication with Authorities: Modern systems link directly to fire departments or monitoring centres to facilitate rapid emergency response.

CODES AND REGULATIONS

Several regulations and codes must be followed to ensure the effectiveness and dependability of fire alarm systems in Malaysia. The Uniform Building By-Laws (UBBL) in Malaysia include regulations for fire safety in buildings. They specify the standards for the installation and maintenance of fire alarm systems, including detectors, alarms, and communication devices. The criteria for automatic fire detection and alarm systems, including provisions for fire alarms, fire command centres, and voice communication systems, are outlined in Law 237, 238 and 239 of the Uniform Building By-Laws (UBBL) 1984 [1].

By-Law 237: Fire Alarms
Fire alarms must be provided in accordance with the Tenth Schedule to these By-laws.

By-Law 238: Fire Command Centre
(1) A fire command centre shall be provided in accordance with the Tenth Schedule, located on the fire appliances access level and shall contain a panel to monitor a public address system, fireman intercom, sprinkler system, water flow detector, fire detection and alarm system and with an automatic fire monitoring system connected to the appropriate fire station by-passing the switchboard or other relevant automatic systems.
(2) A fire command centre shall be separated from other parts of the same building by a compartment wall or compartment floor which is having at least two hours fire resistance period, is readily accessible, preferably directly from the open air, and unless inapplicable, a route to the fire command centre shall be protected.

By-Law 239: Voice Communication System
There shall be two separate approved continuously electrically supervised voice communication systems including a fireman intercom system and a public address system in the following areas:
(a) The fireman intercom shall be provided in every firefighting access lobby or adjacent to a fire fighting staircase and shall also be provided in a refuge area, lift motor room, fire pump room, generator room and fire command centre in accordance with the Tenth Schedule; and
(b) The public address system shall be provided in accordance with the Tenth Schedule.

MAIN TYPES OF FIRE DETECTION AND ALARM SYSTEMS

1. 1. 1.  Conventional Systems
         
         Conventional systems operate by using physical cabling to connect multiple detectors and manual call points to a central control panel. These systems are commonly applied in small commercial premises such as shops, restaurants, and offices, where the building is divided into several detection zones. Each zone is typically equipped with alarm devices such as bells or electronic sounders. When a detector or manual call point is activated, the control panel indicates the affected zone through visual indicators or text display, allowing personnel to investigate and identify the source of the alarm.
         
         
      2. Addressable Systems
         
         Addressable systems provide real-time information and status updates for individual detectors and devices. Each device is assigned a unique address, typically configured through software or DIP switches, allowing the control panel to identify the exact location of an activated or faulty device. The detection circuit is wired in a loop configuration, enabling multiple devices to be connected on a single circuit.
         
         
      3. Intelligent Systems
         
         Intelligent systems incorporate microprocessors within each detector, allowing the devices to analyse environmental conditions and communicate detailed status information to the control panel. These systems are capable of reporting faults, fire conditions, and maintenance requirements such as detector contamination or the need for cleaning. Compared to conventional and standard addressable systems, intelligent systems are more advanced and offer enhanced diagnostic and control features.
         
         
      4. Wireless Systems
         
         Wireless systems are a practical alternative to conventional wired fire alarm systems. In a wireless system, detectors and devices communicate with the control panel through secure, licence-free radio signals. These systems eliminate the need for physical cabling while still providing reliable fire detection and monitoring functions.

FIRE ALARM PANELS

Fire detection and alarm systems are controlled by fire alarm panels, sometimes referred to as fire alarm control panels (FACP) or fire alarm annunciator panels. Their primary function is to receive and process data from various detection devices, and then initiate the appropriate response when a fire or smoke is detected.
The main fire alarm panel must be installed in a readily accessible area, such as the Fire Command Centre (FCC), security room, guardhouse, main entrance, lobby, or other locations acceptable to the Fire and Rescue Department of Malaysia (FRDM). Its components include:

• • Alarm, fault and isolation indication for each zone;
  • Indicator lights to monitor status of power supply and fire safety, such as fire pumps, smoke control equipment, carbon dioxide (CO2) systems, fire tank water levels and other equipment;
  • Mimic panel to identify location of each zone; and
    
  • Battery with charger to provide power supply for the whole system.

Figure 1: Fire Alarm Panel[2]

MAINTENANCE FOR FIRE DETECTION AND ALARM SYSTEMS

The maintenance of the fire alarm system should be carried out on a regular schedule to ensure it functions effectively during an emergency, thus protecting the building and its occupants in a fire. Visual inspections are carried out once a month to assess the power status, indication lights, and control panel condition. The functioning of detectors, alarm sounders, manual call points (MCPs), and communication links are recommended to be tested frequently to guarantee appropriate reaction and signal transmission. During the same period, battery and power supply inspections are performed to measure voltage, test the charger, and replace any faulty batteries to ensure continuous power delivery. In addition, fire alarm system maintenance can prevent unnecessary false alarms that hinder firefighters from responding to other more important emergencies.

CONCLUSION

In conclusion, fire alarm systems are vital for protecting lives and property through early detection, rapid reporting, and coordinated emergency response. The Uniform Building By-Laws (UBBL) 1984, particularly By-Laws 237, 238, and 239 highlight their importance in Malaysia by mandating fire alarms, command centres, and voice communication systems where applicable. With various options available including conventional, addressable, intelligent, and wireless system, building owners can select solutions that fit their specific needs while ensuring legal compliance and permitted by the FRD. Ultimately, installing a reliable fire alarm system fulfills statutory obligations and significantly reduces the risk of injury and property loss, reflecting a commitment to building safety and public protection.

Ir. Dr. Justin LAI Woon Fatt
CEO/ Founder
IPM Group

Author: Ir. Dr. Justin LAI Woon Fatt | 28 November, 2025

Introduction

Project Management Consultancy (PMC) plays a critical role in the successful delivery of construction projects by providing oversight, coordination, and control across time, cost, quality, and safety parameters.

Different projects require different levels of project management involvement, depending on project size, complexity, client capability, and risk profile. Generally, PMC services to clients can be categorised into three broad levels: Basic, Standard, and Comprehensive. Each level reflects a different degree of involvement, responsibility, and client reliance, allowing project owners to select a suitable approach based on their project specific needs.

1. Basic PMC – Coordination & Monitoring

At this level, the PMC primarily function as a coordinator, focusing on communication and progress tracking rather than active management. The role ensures that information flows smoothly between stakeholders and that the project stays aligned with its planned timeline. In a typical basic PMC arrangement, tasks include facilitating coordination meetings, identifying statutory approval, and producing monthly progress reports. Potential risks or issues are highlighted for client’s attention but not make decisions or implement corrective actions directly. Cost and procurement management are excluded, while quality assurance is limited to general observation.

Client involvement in this model remains high, as most decisions and control continue rest with the client. This approach is normally used for small-scale projects or when the client has strong in-house management resources and mainly requires external assistance to monitor progress.

2. Standard PMC – Management & Control

The Standard PMC service offers a more structured and hands-on approach. At this level, the PMC not just only coordinate but also actively manages project performance in areas such as schedule, cost, and quality. Responsibilities typically include leading meetings, manage statutory approvals, authority coordination, developing and updating the master programme, and preparing detailed reports that cover progress, cost variations, and risks. Corrective actions are recommended when delays or budget issues arise. Support is also provided in procurement and contract administration to ensure compliances with statutory, safety, and quality standards. In addition, PMC liaise with local authorities and ensure timely response to their comments.

Unlike the Basic PMC, this level places the PMC in a more influential role. The client still makes final decisions, but professional advice and structured control mechanisms are provided to guide those decisions. This level of service is well suited for medium to large projects, where efficiency and coordination between multiple teams are critical to success.

3. Comprehensive PMC – Full-Service Project Management

The Comprehensive PMC represents the highest and most extensive level of project management service. In this arrangement, the PMC acts as the client’s representative, overseeing the project from initiation to completion, and supporting client in navigating the complexities of the construction process [1]. This includes chair meetings, strategically manage and secure approvals, manages the overall project schedule, and ensures that every milestone is achieved according to the plan. Reporting is detailed, covering time, cost, quality, scope, and risk. The PMC also oversees cost control, cash flow management, and procurement, including tendering and contract administration.

In addition, quality assurance systems and compliance with regulatory and statutory requirements are ensured. During the final stages, the PMC leads the testing, commissioning, and handover process, ensuring complete and proper documentation. Client involvement in this model is minimal, with the PMC manage most day-to-day decisions, while the client primarily reviews and approves major milestones or financial commitments. This full-service model is suitable for large-scale, complex, or high-value projects, where the client prefers a single point of responsibility.

Conclusion

Choosing the right level of PMC service depends on the complexity of the project, the resources available within the client’s organization, and the desired degree of control. By selecting the appropriate PMC service level, clients can ensure that their projects are managed efficiently, transparently, and aligned with overall objectives from initial planning to successful completion.

Ir. Dr. Justin LAI Woon Fatt
CEO/ Founder
IPM Group