In Kuala Lumpur’s tropical environment, a building must act like a "balloon"—slightly over-inflated to keep the outside world out. If your building has Negative Pressure, it will suck in hot, humid air through every window seal, door gap, and elevator shaft. This leads to condensation on air vents, mold growth, and massive energy waste.
As part of a Ventilation Systems Audit, EKG performs specialized testing to ensure your mechanical fans are creating the correct "Positive Pressure" barrier for your facility.
If your building is "leaking" air or under-pressurized, you will notice these mechanical and structural warning signs:
"Sweating" Supply Grilles: Hot, humid outside air hits cold metal vents, causing water to drip onto office carpets.
Heavy Exterior Doors: If the main lobby doors are difficult to push open (or slam shut violently), the fan system is not balanced against the building's volume.
Whistling Elevators: Air rushing through narrow gaps in lift shafts or stairwells creates high-pitched "wind" noises.
Musty Odors: Negative pressure pulls air from toilets, basements, or sewer drains into the main workspace.
We use a combination of volumetric measurement and pressure mapping to find where your "Cool Air" is escaping:
Differential Pressure Mapping: We use digital manometers to measure the pressure difference between the interior and exterior of the building. We aim for a target of +5 to +12 Pascals of positive pressure.
Supply-to-Exhaust Balancing: We audit the total volume (CFM) of air being pushed in by Fresh Air Fans versus the volume being sucked out by Exhaust Fans. If the exhaust exceeds the supply, the building goes negative.
Blower Door Testing: For specific zones like server rooms or labs, we use a calibrated fan to depressurize the room and identify specific leakage points in the walls or ceilings.
Thermal Imaging Leak Detection: We use infrared cameras to see "Thermal Plumes" where cold air is escaping into the ceiling void or outside, identifying wasted cooling energy.
A "leaky" building forces your AHU fans to run at higher speeds to compensate for the lost pressure. Fixing the leaks allows you to slow down the motor.
Load Reduction: Once the building is sealed and pressurized, the mechanical load on the fans drops significantly.
The Logic: Because of the Cube Law, a 20 percent reduction in fan speed results in a nearly 50 percent reduction in power consumption. Building Pressurization testing gives you the "Structural Proof" needed to lower your Variable Frequency Drive (VFD) speeds.
| Zone | Target Pressure (Pascals) | EKG Audit Focus |
| Main Lobby / Office | +5 to +12 Pa | Preventing Humidity Ingress |
| Server Room | +15 to +25 Pa | Dust Exclusion & Cooling Control |
| Hospital Operating Theater | +30 to +50 Pa | Contamination Barrier (Clean to Dirty) |
| Kitchen / Toilet | -5 to -15 Pa (Negative) | Odor Containment |
| Stairwell (Smoke Spill) | +50 Pa (during fire) | BOMBA Fire Safety Compliance |
BOMBA Life Safety Compliance: We verify that your "Staircase Pressurization" fans meet the fire department's safety requirements for smoke clearance.
Mechanical Fan Overhaul Support: If we find the building is negative, we don't just report it. we look at the Fresh Air Intake Fans to see if belt slip or dirty impellers are the root cause.
Ductwork Integrity Checks: We ensure your supply ducts are not leaking 30 percent of their air into the ceiling before it ever reaches the occupants.
VFD Tuning Integration: We provide the specific frequency (Hz) setpoints for your drives to maintain the "Sweet Spot" of positive pressure at the lowest energy cost.
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