HRV Airflow Performance Audit | Efficiency Diagnostics by EKG (Malaysia) Sdn Bhd
In the context of the 2026 Energy Efficiency and Conservation Act (EECA) and the DOSH ICOP IAQ 2026 standards, a "functioning" ventilation system is no longer enough. Your Heat Recovery Ventilation (HRV) must be mathematically verified to deliver the mandated 10 l/s per person of fresh air while maintaining its thermal recovery efficiency. An Airflow Performance Audit is a deep-dive diagnostic into the fluid dynamics and thermal exchange of your unit.
At EKG M&E, we utilize high-precision instrumentation to benchmark your HRV's actual performance against its theoretical design, identifying "Energy Leaks" that drive up your TNB utility bills.
1. Advanced Airflow & Pressure Profiling
We move beyond simple anemometer readings to map the internal aerodynamics of your HRV system:
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Volumetric Flow Verification: We measure the actual supply and exhaust air volumes to ensure the system is perfectly balanced. An imbalanced HRV can lead to building "Infiltration" (sucking in hot, humid KL air) or "Exfiltration" (leaking expensive cooled air).
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Static Pressure Mapping: We identify "bottlenecks" in your ductwork or across fouled heat exchange plates. High static pressure forces fans to work harder, consuming excessive energy to move the same amount of air.
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Duct Leakage Testing: Even a 10% leak in your retrofitted ductwork can negate the energy savings of a high-efficiency core. We identify these losses to ensure 100% of the "recovered coolth" reaches the occupied zones.
2. Thermal Exchange Efficiency Audit
The primary value of an HRV is its ability to recycle energy. We audit the "Temperature Exchange Efficiency" (TEE) to see how much money you are saving:
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Delta-T Analysis: We measure the temperature of the air at all four ports (Outdoor Intake, Supply to Room, Return from Room, and Exhaust Out).
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The ROI Calculation: In a typical 32°C Malaysian afternoon, if your HRV is only cooling the intake air to 30°C instead of the design 27°C, your chillers are working 25% harder than necessary. We identify why this gap exists—whether it's due to core fouling, internal bypass, or poor insulation.
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Sensible vs. Latent Load Check: For units equipped with Enthalpy wheels, we audit the moisture transfer efficiency to ensure your building isn't becoming a "humidity trap."
3. VFD Optimization & Control Logic Review
Most HRV units in Malaysia are over-ventilating during low-occupancy periods. Our audit includes a full review of your Variable Frequency Drive (VFD) settings:
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The Cube Law Verification: We analyze your fan's power-to-speed curve. By optimizing the VFD to match actual occupancy (via CO2 sensors), we often uncover energy savings of 30% to 50% that were previously being wasted by fixed-speed operation.
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Static Pressure Reset Calibration: We program the VFD to "ramp down" when dampers close, preventing the system from fighting unnecessary resistance and extending the life of your fan motors.
4. Mechanical Health: FFT Vibration Analysis
An efficient system must be mechanically sound. We use Fast Fourier Transform (FFT) Analysis to inspect the "moving parts" of your HRV:
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Vibration Fingerprinting: We monitor the vibration signature of the supply and exhaust fans. We can detect bearing wear, shaft misalignment, or impeller imbalance—all of which increase electrical drag—months before they cause a breakdown.
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Resonance Locking: If the audit reveals that certain fan speeds cause the ductwork to vibrate, we program the VFD to "skip" those frequencies, ensuring a silent and efficient operation for building occupants.
Why Choose EKG M&E for Your Audit?
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34 Years of Engineering Excellence: We are a proudly Malaysian conglomerate specializing in end-to-end MEP and ACMV-R solutions.
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Compliance Ready: Our audit reports provide the necessary documentation for EECA 2026 compliance and GBI (Green Building Index) energy credits.
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Actionable ROI: We don't just provide data; we provide a costed "Energy Saving Measure" (ESM) plan, showing exactly how much you will save by implementing our recommendations.
