Details

---

Pressurization Fan Ductwork by EKG M&E Sdn Bhd

In the high-rise landscape of Kuala Lumpur and Selangor, the Pressurization Fan Ductwork serves as the critical "airway" that links the powerful supply fans to the building's escape stairwells and smoke lobbies. This system is engineered to deliver high-velocity fresh air to create a positive pressure shield, physically preventing toxic smoke from entering evacuation routes.

EKG M&E Sdn Bhd specializes in the precision installation of these fire-rated networks, ensuring full compliance with MS 1472, BOMBA standards, and the Uniform Building By-Laws (UBBL).

---

Engineering for Pressure and Survival

Unlike standard air-conditioning ducts, pressurization ductwork must withstand extreme internal pressures and external heat without losing its structural or airtight integrity.

1. FRL 120/120/120 Fire Rating

Because these ducts often pass through multiple fire compartments (from a roof-mounted fan down through various floors), they must be protected against fire exposure.

• Integrity & Insulation: We encase the heavy-gauge galvanized steel (G.I.) in BOMBA-approved fire-rated boards or high-density fire wraps. This ensures that even if a fire occurs on an intermediate floor, the duct remains intact and the air inside stays cool.

• Structural Stability: We utilize reinforced, fire-rated hanger systems to ensure the ductwork does not buckle or collapse under the intense thermal expansion of a fire event.

2. High-Static Airtight Construction

To maintain the mandatory 50 Pa (Pascals) pressure differential in a stairwell, the ductwork must be exceptionally airtight.

• Class C & D Sealing: We build these systems to the highest airtightness standards (DW/143 Class C/D). Every joint is sealed with certified intumescent gaskets and sealants that expand under heat to maintain a hermetic seal.

• Precision Transitions: We utilize smooth, long-radius elbows and transitions to minimize turbulence and static pressure loss, ensuring maximum fan efficiency.

---

Critical Operational & Energy Benefits

As a BOMBA-Compliant M&E Specialist, EKG ensures your fan ductwork supports long-term building performance:

• TNB Energy Efficiency (Lower Operational Hz):

  A leaky duct system forces the fan motor to work harder to hit the target pressure. By ensuring a precision-sealed installation, your Variable Frequency Drive (VFD) can maintain safety standards at lower frequencies (Hz). This directly reduces your monthly TNB electricity bill during mandatory weekly testing.

• EECA 2024 & Building Sustainability:

  Under the Energy Efficiency and Conservation Act (EECA) 2024, mechanical air transport must be optimized for minimal waste. Our fire-rated ducting protects your Building Energy Index (BEI) and supports green building certifications.

• Prevention of "Door-Lock":

  If the ductwork is not properly balanced, the pressure at the top of the stairwell can become too high, making fire doors impossible to open (exceeding the 110 N limit). EKG utilizes calibrated discharge grilles and relief dampers to ensure safe door-opening forces on every floor.

---

Pressurization Duct Performance Matrix

Feature	Standard HVAC Ductwork	EKG Pressurization Ductwork
Airtightness Class	Class A / B	Class C / D (Airtight)
Internal Pressure	Low Static	High Static (Positive)
Fire Rating	None	Mandatory (FRL 120/120/120)
BOMBA Required	No	Mandatory for High-Rise FC
Joint Type	Standard Gasket	High-Temp Intumescent Gasket

---

Why Choose EKG M&E Sdn Bhd?

• Total 3D BIM Coordination: We utilize 3D modeling to route these heavy ducts through crowded KL high-rise shafts, ensuring zero "clashes" with sprinklers, standpipes, or structural beams.

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

• Strategic Regional Support: Based in Kuala Lumpur, we provide professional ductwork audits and installations for Grade-A office towers, luxury condominiums, and hospitals across Malaysia.

Is your building's life-safety airway engineered to survive? Contact EKG M&E Sdn Bhd today for a professional pressurization fan ductwork audit and technical proposal.