Stairwell Air Pressure System

Stairwell Air Pressure System by EKG M&E Sdn Bhd

In the high-rise architecture of Kuala Lumpur and Selangor, a Stairwell Air Pressure System (commonly known as a Staircase Pressurization System) is a life-critical mechanical defense. Its primary function is to maintain a "pressure sandwich"—keeping the air pressure inside the escape stairwell higher than the pressure on the fire floor.

EKG M&E Sdn Bhd engineers these systems to ensure that when a fire door is opened, air flows out of the stairwell, physically pushing smoke back and keeping the evacuation route 100% clear of toxic gases.

The Mechanics of Pressure Protection

A functional air pressure system operates on a delicate balance of mechanical force and building physics, governed by MS 1472 and the Uniform Building By-Laws (UBBL).

1. The 50 Pa Standard (Static Protection)

When all fire doors are closed, the system maintains a steady-state pressure differential of 50 Pa (Pascals).

• The Pressure Shield: This positive pressure ensures that even if there are small gaps around door frames or seals, smoke cannot "leak" into the stairwell.

• Fire-Rated Air Delivery: The air is delivered via 2-hour fire-rated ducts (FRL 120/120/120). This ensures that the system continues to pump fresh air even if the floor directly adjacent to the ducting is engulfed in flames.

2. The 1.0 m/s Velocity (Active Protection)

When an occupant opens a fire door to escape, the "static" pressure drops. The system must then pivot to "velocity" mode.

• Smoke Washing: The system is engineered to provide an air velocity of at least 1.0 m/s across the full area of the open doorway. This acts as an invisible wall, "washing" any smoke away from the stairwell entrance.

• VFD Integration: We utilize Variable Frequency Drives (VFDs) that sense the pressure drop and instantly ramp up the fan speed to maintain safety.

Critical Operational & Energy Benefits

As a BOMBA-Compliant M&E Specialist, EKG ensures your air pressure system supports long-term building performance:

• TNB Energy Efficiency (Leakage Control):

  For the system to maintain 50 Pa efficiently, the ductwork and stairwell must be airtight. By using Class C/D precision-sealed ducts, we minimize the "work" the fan has to do. This allows the motor to run at lower frequencies (Hz) during mandatory weekly testing, directly reducing your monthly TNB electricity bill.

• EECA 2024 & Building Sustainability:

  Under the Energy Efficiency and Conservation Act (EECA) 2024, every mechanical system must be optimized. Our precision-engineered air paths prevent "over-blowing," which can waste significant energy and place unnecessary stress on the building's electrical infrastructure.

• Prevention of "Door-Lock":

  If a system is not properly balanced, the pressure can become too high, making it impossible for children or the elderly to pull open the heavy fire doors (exceeding the 110 N force limit). EKG utilizes barometric relief dampers to bleed off excess pressure, ensuring the doors remain safe and easy to operate.

System Performance Matrix

Why Choose EKG M&E Sdn Bhd?

• Total 3D BIM Coordination: High-rise shafts are crowded with wet risers and conduits. We utilize 3D modeling to route the pressurization air paths with zero "clashes," ensuring uniform air distribution to every floor.

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

• Strategic Regional Support: Based in Kuala Lumpur, we provide professional air pressure system audits and installations for Grade-A offices, hospitals, and luxury high-rises across Malaysia.

Is your building's air pressure system balanced for safety and efficiency? Contact EKG M&E Sdn Bhd today for a professional system audit and technical proposal.