Pressure-relief vent staircase ducting

Pressure-Relief Vent Staircase Ducting by EKG M&E Sdn Bhd

In the high-rise landscape of Kuala Lumpur and Selangor, a staircase pressurization system is only effective if it is balanced. Pressure-Relief Vent (PRV) Staircase Ducting is the critical "safety valve" of a life-safety system. Its primary role is to prevent the stairwell from becoming over-pressurized, which would make fire doors impossible to open for children, the elderly, or those with disabilities.

EKG M&E Sdn Bhd specializes in the engineering and installation of these relief systems, ensuring your building meets the strict 110 N (Newton) door-opening force limits set by BOMBA and MS 1472.

The Engineering of a Balanced Sanctuary

A pressurization fan is designed to provide enough air velocity (1.0 m/s) to wash away smoke when a door is open. However, when all doors are closed, that same volume of air can create massive pressure.

1. Preventing "Door-Lock"

Under BOMBA regulations, the force required to pull open a fire door must not exceed 110 N. Without a pressure-relief vent, the internal pressure can easily exceed this, effectively locking occupants inside the burning floor.

• Barometric Relief Dampers (BRD): We install weighted or spring-loaded dampers that automatically pivot open when the internal pressure exceeds the set limit (usually 50 Pa).

• Motorized Bypass Systems: In advanced KL high-rises, we utilize motorized relief vents linked to pressure sensors. If the pressure climbs too high, the vent opens to bleed air into the atmosphere or a secondary shaft.

2. Fire-Rated Duct Integration (FRL 120/120/120)

Because the relief ducting often passes through fire compartments to reach the building exterior, it must maintain the same integrity as the supply ducting.

• Integrity & Insulation: We encase relief ducts in BOMBA-approved fire-rated boards or wraps. This ensures that a fire on an intermediate floor cannot breach the relief airway, maintaining the stairwell's pressure balance.

Critical Operational & Energy Benefits

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

• TNB Energy Efficiency (VFD Synchronization):

  By combining relief vents with Variable Frequency Drives (VFDs), we create a synchronized system. When the vent opens, the fan can be programmed to modulate its frequency (Hz), preventing "air hunting" and reducing unnecessary power surges. This directly results in a lower 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. Our precision-tuned relief vents prevent "over-blowing," ensuring that energy is used only to maintain the mandatory safety threshold.

• Prevention of "Whistling" & Structural Stress:

  Untuned systems often cause high-pitched whistling as air forces itself through door gaskets. Proper relief ducting stabilizes the air environment, reducing acoustic stress and preventing damage to door seals and hinges.

Pressure-Relief Performance Matrix

Why Choose EKG M&E Sdn Bhd?

• Total 3D BIM Coordination: Relief vents must often be placed at the top of the stairwell or in tight ceiling voids. We utilize 3D modeling to route fire-rated relief ducts with zero "clashes" against structural beams or wet risers.

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

• Precision Tuning: We don't just install; we calibrate. Our team uses digital manometers and force gauges to ensure the relief vent triggers at exactly the right moment.

Is your stairwell safety system balanced for an easy exit? Contact EKG M&E Sdn Bhd today for a professional pressure-relief vent audit and technical proposal.