In a high-rise office or commercial complex in Kuala Lumpur, your ductwork is a pressurized highway for cool air. However, studies show that typical commercial ductwork can leak between 15 percent and 30 percent of its treated air into ceiling voids before it ever reaches the occupants. A Ductwork Smoke Testing & Leakage Audit is the only way to "see" these invisible energy losses and fire safety gaps.
As part of a Ventilation Systems Audit, EKG uses theatrical-grade smoke and digital manometers to find the holes that are driving up your TNB bills and compromising your building's pressurization.
Leaking ducts are more than just an energy drain; they are a mechanical and safety liability:
The "TNB Tax": Your AHU fan works 20 percent harder to compensate for air that is cooling the "dead space" above your ceiling tiles.
Humidity Ingress: Leaks in return air ducts pull hot, moist air from the ceiling plenum into your AHU, leading to "sweating" vents and mold growth.
Fire & Smoke Path: In a fire, leaky ducts can act as a "chimney," pulling toxic smoke into clean zones. A smoke test proves the integrity of your smoke-spill containment.
Acoustic Issues: High-pressure leaks create "whistling" or "hissing" noises that disturb office occupants.
We use two distinct methods to map your ductwork's integrity:
Theatrical Smoke Injection: We inject non-toxic, odorless "high-density" smoke into the sealed duct section under pressure. Our technicians then trace the duct run to identify "plumes" escaping from joints, seams, or failed gaskets.
Duct Static Pressure Testing (DW/143): We use a calibrated fan and digital manometer to measure the exact "Leakage Rate" (liters per second per square meter). This tells us if your ductwork meets Class A, B, or C international sealing standards.
VAV & Damper Seal Audit: We specifically test the connection points of Variable Air Volume (VAV) boxes and motorized dampers, where 80 percent of mechanical leaks occur.
Thermal Imaging Overlay: We use infrared cameras to spot "Cold Spots" in the ceiling, confirming where leaked air is pooling.
A leaky duct system forces the main fan to run at a higher frequency (Hz) to maintain the required static pressure at the furthest vent.
Pressure Restoration: By sealing leaks, the internal pressure of the duct rises, allowing the fan to move the same amount of air at a lower speed.
The Logic: Because of the Cube Law, a 20 percent reduction in fan speed results in a nearly 50 percent reduction in power consumption. A Leakage Audit is the "Financial Proof" needed to safely lower your Variable Frequency Drive (VFD) speeds.
| Duct Class | Typical Use Case | EKG Leakage Standard |
| Class A (Low) | General Office Branch Ducts | Minimal Visual Smoke Escape |
| Class B (Medium) | Main AHU Risers | Zero Audible Leaks at 500 Pa |
| Class C (High) | Smoke-Spill & Lab Exhaust | Zero Visible Smoke Escape |
| Class D (Critical) | Cleanrooms & Hospitals | Precision Pressure Decay Tested |
Mechanical Correction Path: If we find leaks, we don't just leave a report. We provide the Mechanical Fan Overhaul and Duct Sealing services (using high-velocity mastic or internal aerosol sealing) to fix the problem.
BOMBA Compliance: We ensure your smoke-extraction ducts are 100 percent airtight, meeting the safety requirements for building fire certification.
VFD ROI Projection: We calculate the exact "Kilowatt Recovery" you will achieve by sealing your ducts and slowing down your fans.
IAQ Protection: Sealing leaks prevents "Ceiling Dust" and fiberglass particles from being sucked into your air stream, improving overall Building Air Health.
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