In the engineering of high-rise safety, the connection between the mechanical "lung" (the fan) and the "airway" (the ducting) is a critical failure point if not integrated correctly. Stairwell Pressurization Fan Duct Integration refers to the specialized mechanical assembly where the high-volume supply fan meets the fire-rated distribution network.
At EKG M&E Sdn Bhd, we ensure this integration is seamless, vibration-isolated, and 100% airtight to meet BOMBA requirements and MS 1472 (Code of Practice for Smoke Control using Pressurization).
Integrating a heavy-duty pressurization fan into a fire-rated escape route requires more than just a standard connection. It requires a synchronized assembly of fire-safety components.
The Power Source: We utilize high-temperature axial fans equipped with Class H motors, certified to operate at ambient and elevated temperatures.
Vibration Isolation: Because these fans are powerful, they must be mounted on inertia bases with spring isolators. This prevents mechanical vibrations from damaging the fire-rated duct joints or creating structural noise in the escape stairwell.
Movement Management: The connection between the vibrating fan and the rigid ducting must be flexible to prevent stress fractures. We utilize certified fire-rated flexible connectors that can withstand direct heat without losing airtightness, ensuring the 50 Pa pressure differential is maintained.
Logic Integration: At the point of integration, we install motorized dampers linked to the building's Fire Alarm Monitoring System (FAMS).
Protection: These dampers stay open during "Fire Mode" to allow pressurization but can seal the duct if the fire reaches the fan room itself, preserving the building's compartmentation.
As a BOMBA-Compliant M&E Specialist, EKG focuses on the precision of the air path to ensure long-term system health:
TNB Energy Efficiency (Optimized Transitions): Poorly integrated "elbows" or "transitions" at the fan outlet create turbulence and static pressure loss. By utilizing Computational Fluid Dynamics (CFD) principles in our duct design, we ensure smooth airflow. This allows the fan to maintain required pressures at lower frequencies (Hz), resulting in a lower monthly TNB electricity bill during weekly testing.
EECA 2024 & Airtightness (DW/143): Under the Energy Efficiency and Conservation Act (EECA) 2024, every mechanical joint must be optimized. We perform mandatory Duct Leakage Testing at the fan-duct interface to ensure that 100% of the fan's output reaches the stairwell lobbies, protecting your Building Energy Index (BEI).
BOMBA Inspection Readiness: A common point of failure in KL high-rises is the seal at the wall penetration. We utilize BOMBA-approved intumescent fire stopping around the integration sleeve, ensuring a hermetic seal that blocks smoke from bypassing the pressurization zone.
| Component | Standard HVAC Setup | EKG Pressurization Integration |
| Fan Connection | Canvas / Fabric | Certified Fire-Rated Flexible Connector |
| Hanger System | Standard Rods | Seismic-Rated Fire Hangers |
| Wall Penetration | Standard Sealant | BOMBA-Approved Intumescent Seal |
| Control Logic | On/Off Switch | Integrated with FAMS & VFD Control |
| Maintenance | Annual | Mandatory Monthly Testing (MS 1472) |
Total 3D BIM Coordination: Fan rooms are often the most congested areas of a building. We utilize 3D modeling to ensure the fan, silencers, and duct transitions fit perfectly without "clashing" with structural beams or other services.
Turnkey BOMBA Submission: We assist in the preparation of technical drawings and perform the mandatory Pressure Differential Test and Door Opening Force Test (ensuring the pressure isn't so high that occupants can't open the door).
Strategic Regional Support: Based in Kuala Lumpur, we provide professional fan-duct integration for Grade-A office towers, luxury condominiums, and hospitals across Malaysia.
Is your building's pressurization fan correctly integrated to ensure life safety? Contact EKG M&E Sdn Bhd today for a professional system audit and technical proposal.
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