In the premium office towers and mixed-use developments of KL and Selangor, the Variable Air Volume (VAV) system is the industry standard for high-precision climate control. Unlike Constant Air Volume (CAV) systems that blast air at a fixed rate, a VAV system varies the amount of air delivered to different zones based on their actual thermal load. EKG M&E Sdn Bhd specializes in the design, installation, and commissioning of VAV networks that maximize occupant comfort while drastically reducing energy consumption.
A VAV system operates on the principle that different parts of a building have different cooling needs at different times. A sun-drenched corner office in the afternoon requires more cooling than a shaded interior meeting room.
Each zone is equipped with a VAV box—a "smart damper" located in the ceiling void.
Modulating Airflow: As the room thermostat reaches its setpoint, the VAV box closes its internal damper to reduce the flow of chilled air.
Reheat Coils: In some high-spec KL offices, we install VAV boxes with electric or hot-water reheat coils. This prevents "over-cooling" in quiet zones by slightly warming the air before it is discharged.
As VAV boxes across the building close their dampers, pressure builds up inside the main ductwork.
VFD Integration: We install Variable Frequency Drives (VFDs) on the main Air Handling Unit (AHU). A static pressure sensor in the duct tells the VFD to slow down the fan motor as demand drops.
Energy Savings: By not running the fan at 100% when only 50% of the building needs cooling, we reduce your TNB electricity costs significantly.
As an HVAC and Clean Air Specialist, we ensure your VAV system does not sacrifice air quality for energy savings:
Demand Controlled Ventilation (DCV):
We integrate CO2 Sensors with the VAV logic. If a boardroom is packed with people, the VAV box will stay open to maintain the Air Change Rate (ACR) and oxygen levels, regardless of the temperature.
Building Pressure Management:
We calibrate the VAV system so that the total supply air is always balanced with the Exhaust Systems. This ensures your facility remains at a slight Positive Pressure, keeping out KL street dust and humidity.
Fresh Air Filtration Service:
We ensure that the air being modulated by the VAV system is medical-grade clean. We utilize MERV 13 filters in the central AHU to scrub out PM2.5 and urban haze common in the Klang Valley.
| Feature | Constant Air Volume (CAV) | EKG M&E VAV System |
| Zone Control | None (One temp for all). | Individual Zone Thermostats. |
| Energy Use | High (Fan always at 100%). | Low (Fan matches demand). |
| Acoustics | Constant air noise. | Whisper-quiet at low loads. |
| Humidity | Can vary. | Stable via VFD/Static Control. |
Airflow Balancing and Commissioning: VAV systems are notoriously difficult to balance. We perform a professional Duct Traverse and VAV Box Calibration. We ensure that the "Minimum Airflow" setpoints are high enough to maintain IAQ but low enough to save energy.
Actuator and Sensor Repair: We provide specialized maintenance for Belimo actuators and DDC controllers. If a zone is "stuck" at one temperature, we diagnose and repair the mechanical linkage or electronic sensor.
Klang Valley Strategic Support: Based in Kuala Lumpur, we provide turnkey design, professional installation, and annual T&C audits for VAV-equipped Grade-A offices and healthcare facilities.
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