Dedicated Outdoor Air System (DOAS) ERV by EKG M&E Sdn Bhd

In the 2026 landscape of EECA 2024 and high-performance building design, the Dedicated Outdoor Air System (DOAS) ERV has become the definitive solution for decoupling the fresh air load from the internal cooling load. A DOAS ERV is a specialized unit designed to handle 100% outdoor air, utilizing energy recovery to pre-condition the intake before it is delivered directly to the occupied spaces or to terminal units like FCUs.

At EKG (Malaysia) SDN BHD, we engineer DOAS ERV systems that provide surgical control over indoor humidity and air quality while drastically reducing the building's overall energy footprint.

1. The Engineering Logic of DOAS

Traditional HVAC systems often struggle in Malaysia because they attempt to cool the room and dehumidify the fresh air simultaneously. A DOAS ERV separates these tasks for maximum efficiency.

• Load Decoupling: The DOAS unit handles the entire "Latent Load" (moisture) and "Sensible Load" (temperature) of the outdoor air. This allows the internal AHUs or FCUs to focus solely on maintaining the room temperature, preventing them from becoming "wet" and prone to mold.

• Total Energy Recovery: We utilize high-efficiency Enthalpy Wheels or Plate Heat Exchangers to transfer both heat and moisture from the incoming fresh air to the cool, dry exhaust air.

• Direct Delivery: Pre-conditioned air is delivered at a "Neutral" state (typically 22 to 24 degrees Celsius and 50% RH), ensuring immediate occupant comfort upon entry.

2. Technical Advantages and 2026 Standards

To meet the 2026 statutory energy audits, EKG-engineered DOAS ERVs incorporate the following high-tier specifications:

3. Humidity Management and Reheat Efficiency

In the Malaysian climate, the primary challenge for DOAS is removing moisture without over-cooling the air.

• Advanced Dehumidification: Our units cool the fresh air below the dew point to strip out moisture.

• Energy-Neutral Reheat: Instead of using electric heaters (which increase BEI), we utilize "Waste Heat" from the condenser circuit or "Wrap-Around Heat Pipes." This re-warms the air to a comfortable supply temperature using energy that is already available in the system.

• Mold Prevention: By delivering "Dry" air (below 60% RH), the DOAS ERV eliminates the risk of condensation and fungal growth within the building's ductwork and ceiling voids.

4. 2026 Statutory Compliance (EECA 2024)

Under the 2026 mandate, the Energy Commission (ST) closely monitors the energy consumed by ventilation.

• SFP Optimization: By utilizing IE5 EC fans and low-pressure-drop recovery media, we keep the Specific Fan Power (SFP) well below the legal limit of 1.1 kW/m3/s.

• Demand Control (DCV) Integration: Our DOAS units are often paired with CO2 sensors. This allows the system to ramp down during low occupancy, providing massive energy savings that are logged directly to your Energy Management System (EnMS).

• Auditable IAQ: The system provides a digital record of fresh air volumes and air quality, essential for maintaining clinical or green building certifications.

5. Why Partner with EKG (Malaysia) SDN BHD?

• Technical Integrity: We provide the Psychrometric Analysis and Latent Load Calculations required to optimize your central chiller plant.

• 3D BIM Coordination: We model the dedicated fresh air duct network to ensure perfect integration with existing services and structural constraints.

• BOMBA-Compliant Safety: All internal components, including the energy recovery core and non-shedding insulation, are fire-rated (Class 0 or B1).

Is your current HVAC system fighting a losing battle against Malaysian humidity? Contact EKG (Malaysia) SDN BHD today. We specialize in engineering DOAS ERV systems that are sterile, silent, and ultra-efficient.