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Stairwell Fan Ducting by EKG M&E Sdn Bhd

In high-rise safety engineering, the Stairwell Fan Ducting acts as the critical airway for the building’s life-support system. While the fan generates the necessary air pressure, the ducting is responsible for delivering that air to every floor of the escape route without leakage or failure.

EKG M&E Sdn Bhd specializes in the design and installation of high-pressure, fire-rated stairwell ducting that ensures your building remains BOMBA compliant and follows the MS 1472 code of practice.

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The Engineering of Vertical Air Distribution

Distributing air across 20, 30, or 50 floors requires a ducting system that can handle high static pressure and maintain a consistent 50 Pa (Pascals) pressure differential throughout the entire stairwell height.

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

Because the ductwork often passes through multiple fire compartments (from the fan room on the roof or basement to the various floor lobbies), it must be protected against external fire.

• Structural Stability: We utilize reinforced hanger systems that prevent the duct from buckling under the thermal expansion caused by a fire.

• Integrity & Insulation: Our systems are encased in BOMBA-approved fire-rated boards or high-density fire wraps to ensure that even if a floor is on fire, the air inside the duct remains cool and smoke-free.

2. Pressure-Sealed Construction

Standard HVAC ducting is not designed for the high pressures required for stairwell protection.

• Leakage Class C & D: We construct these ducts to the highest airtightness standards. This ensures that the air pressure at the bottom-most floor is just as effective as at the top floor.

• Reinforced Joints: To prevent "pillowing" or joint failure under high pressure, we utilize specialized transverse joint reinforcements and high-temperature intumescent gaskets.

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Critical Operational & Energy Benefits

As a BOMBA-Compliant M&E Specialist, EKG ensures your stairwell fan ducting contributes to the building's overall performance:

• TNB Energy Efficiency (Lower Static Loss):

  Poorly constructed ducting with high leakage forces the fan to run at higher speeds to achieve the target pressure. By ensuring a precision-sealed system, your Variable Frequency Drive (VFD) can operate at lower frequencies (Hz) during weekly testing. This reduces wear on the motor and lowers your monthly TNB electricity bill.

• 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) by ensuring no conditioned air is lost to unconditioned shafts.

• Tenability & Occupant Safety:

  The ducting ensures that when an escape door is opened, the air velocity (typically 1.0 m/s across the open door) is strong enough to push back smoke, keeping the stairwell a "breathable sanctuary" for evacuation.

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Stairwell Ducting Performance Matrix

Feature	Standard HVAC Ducting	EKG Stairwell Fan Ducting
Air Leakage Standard	Class A / B	Class C / D (Airtight)
Operating Pressure	Low (Static)	High (Differential of 50 Pa)
Fire Protection	None	Mandatory (FRL 120/120/120)
Joint Type	Standard Gasket	High-Temp Intumescent Gasket
BOMBA Inspection	Not Required	Mandatory for Fire Certificate

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Why Choose EKG M&E Sdn Bhd?

• Total 3D BIM Coordination: Stairwell shafts are often tight and shared with other utilities. We utilize 3D modeling to route fire-rated ducts with zero "clashes" against standpipes, electrical conduits, or structural beams.

• Turnkey BOMBA Submission: We provide all technical documentation and conduct the mandatory Pressure Differential Test and Anemometer Airflow Traverse required for your Fire Certificate (FC).

• Precision Balancing: We install multi-blade volume control dampers at every discharge point to ensure the pressure is balanced perfectly across all floors, preventing "over-pressurization" that would make doors hard to open.

Is your stairwell air distribution system engineered to survive a fire? Contact EKG M&E Sdn Bhd today for a professional stairwell fan ducting audit and technical proposal.