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Positive Pressure Smoke Control Ducting by EKG M&E Sdn Bhd

In the high-rise landscape of Kuala Lumpur and Selangor, fire safety is a battle of air pressure. Positive Pressure Smoke Control Ducting is the active mechanical system responsible for injecting fresh air into escape routes—primarily stairwells and fire lobbies. By creating a high-pressure zone (a "pressure shield"), this ducting physically blocks toxic smoke from entering evacuation paths, keeping them tenable for occupants and emergency responders.

EKG M&E Sdn Bhd specializes in the engineering, installation, and balancing of these systems to ensure strict compliance with MS 1472, BOMBA standards, and the Uniform Building By-Laws (UBBL).

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The Engineering of the Positive Pressure Shield

The system operates on the principle of fluid dynamics: air always moves from high pressure to low pressure. By keeping the escape route at a higher pressure than the fire floor, smoke is effectively "pushed back."

1. FRL 120/120/120 Fire-Rated Integrity

Because positive pressure ducts often travel through various fire compartments to reach the stairwell, they must be protected against external fire.

• Integrity & Insulation: We encase heavy-gauge galvanized steel (G.I.) in BOMBA-approved fire-rated boards or high-density mineral wool wraps. This ensures the duct remains intact and the air inside stays cool, even if the adjacent floor is engulfed in flames.

• Structural Stability: We utilize reinforced, fire-rated hanger systems that prevent the ductwork from buckling or collapsing under intense thermal stress.

2. Maintaining the 50 Pa Differential

Under MS 1472, the system must maintain a stable pressure differential.

• Static Protection: When all fire doors are closed, the ducting must deliver enough air to maintain a 50 Pa (Pascal) difference between the stairwell and the floor area.

• Dynamic Protection (1.0 m/s): When a door is opened, the system must instantly provide an air velocity of 1.0 m/s across the opening to "wash away" any incoming smoke.

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Critical Operational & Energy Benefits

As a BOMBA-Compliant M&E Specialist, EKG ensures your smoke control infrastructure supports building efficiency:

• TNB Energy Efficiency (Leakage Control):

  A leaky duct system forces the fan motor to work harder to hit the 50 Pa target. By ensuring a Class C Airtight installation, we allow your Variable Frequency Drive (VFD) to maintain safety standards at lower frequencies (Hz). This directly reduces your monthly TNB electricity bill during mandatory weekly testing.

• EECA 2024 & Building Compliance:

  Under the Energy Efficiency and Conservation Act (EECA) 2024, mechanical air transport must be optimized for minimal waste. Our precision-sealed fire ducts protect your Building Energy Index (BEI) and support green building certifications.

• Prevention of "Door-Lock":

  If the positive pressure is untuned, it can make fire doors impossible to open (exceeding the 110 N force limit). EKG utilizes calibrated discharge grilles and Barometric Relief Dampers to ensure the pressure is safe for all occupants to exit.

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Performance Comparison Matrix

Feature	Standard Ventilation Ducting	EKG Positive Pressure Ducting
Primary Goal	Occupant Comfort	Life Safety & Smoke Rejection
Pressure State	Neutral / Negative	Positive (Minimum 50 Pa)
Fire Rating	None	Mandatory (FRL 120/120/120)
Joint Sealing	Standard Mastic	Certified Intumescent Sealant
BOMBA Required	No	Mandatory for High-Rise FC

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Why Choose EKG M&E Sdn Bhd?

• Total 3D BIM Coordination: High-rise shafts are extremely congested. We utilize 3D modeling to route fire-rated ducts with zero "clashes" against sprinklers, wet risers, or structural beams.

• Turnkey BOMBA Submission: We perform the mandatory Pressure Differential Test, Door Opening Force Test, and Anemometer Airflow Traverse required for your Fire Certificate (FC) application.

• Strategic Regional Support: Based in Kuala Lumpur, we provide professional audits and technical proposals for shopping malls, data centers, and Grade-A office towers across Malaysia.

Is your building's escape route protected by a certified positive pressure shield? Contact EKG M&E Sdn Bhd today for a professional smoke control ducting audit and technical proposal.