In a commercial building, a Testing, Adjusting, and Balancing (TAB) audit is the process of ensuring that the air leaving your fans actually reaches its intended destination in the correct volume. Without proper balancing, some rooms in your office will be "freezing" while others are "stuffy," and your main fans will waste massive amounts of energy fighting internal pressure imbalances.
As part of a Ventilation Systems Audit, EKG performs TAB to restore your building's "Mechanical Harmony," ensuring every vent delivers exactly what the engineers designed.
If your system hasn't been balanced in the last 24 months, you are likely suffering from:
Short-Circuiting: Air takes the path of least resistance, dumping all the cooling near the AHU room while "starving" the far end of the floor.
Negative Pressure Infiltration: When exhaust fans pull more air than the supply fans provide, the building sucks in hot, humid KL air through every door gap and window seal.
Excessive Noise & Vibration: Air trying to force its way through a partially closed damper creates a "whistling" sound and puts back-pressure on the fan motor.
We use the Proportional Method to ensure that if you turn down the main fan, every room scales down equally:
Volumetric Traverse: We measure the total air volume at the main duct using Pitot tubes. This confirms if the fan is even capable of meeting the building's demand.
Branch-to-Grille Balancing: We use calibrated Air Flow Hoods (Balometers) to measure every single supply and return vent. We adjust manual dampers until every room is within 10 percent of its design target.
Diversity Factor Audit: We check if your system can handle "Peak Loads." We ensure that when a meeting room is full, the VAV boxes open correctly without starving the rest of the office.
VFD Setpoint Optimization: Once the system is balanced, we find the lowest possible fan speed (Hz) that still satisfies the furthest vent in the building.
Air balancing is the most effective way to lower your TNB bill. An unbalanced system forces the fan to run at "Full Speed" just to get air to a single "Hot Spot."
Speed Reduction: Once the "starved" rooms are balanced, the main fan no longer needs to over-compensate.
The Logic: Because of the Cube Law, a 20 percent reduction in fan speed (made possible by proper balancing) results in a nearly 50 percent reduction in power consumption. TAB provides the "Volumetric Proof" to safely lower your VFD frequencies.
| Measurement | Healthy Range | Unbalanced Sign |
| Supply Air Volume | +/- 10% of Design | Starved or Over-Blown Zones |
| Room Pressure | +5 to +12 Pascals | Negative Pressure (Humidity Sucking) |
| Duct Static Pressure | 250 to 450 Pascals | High Pressure (Blocked/Choked) |
| Terminal Velocity | 0.15 to 0.25 m/s | Drafts or Stagnant Air |
Holistic Mechanical Focus: We don't just move dampers. We are experts in Mechanical Fan Overhauls, offering motor repairs, bearing replacements, and coil cleaning to ensure the fan has the "Lift" required to be balanced.
VFD ROI Projection: We calculate exactly how much energy you were wasting by "over-pressurizing" your ducts, showing the Ringgit savings of a balanced system.
Occupant Comfort: We eliminate the "AC Wars" in your office by ensuring even temperature distribution across the entire floor.
Compliance Ready: Our TAB reports are documented to meet GBI (Green Building Index) and LEED requirements for system commissioning.
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