Low Energy AC Design

Low Energy AC Design by EKG (Malaysia) SDN BHD

In the 2026 landscape of EECA 2024 and MS 1525:2024, Low Energy AC Design is no longer an optional "green" feature—it is a mandatory statutory requirement for commercial and industrial buildings in Malaysia. To achieve a 4-star or 5-star Building Energy Intensity (BEI) rating, the Air Conditioning system must be engineered as an integrated high-efficiency ecosystem rather than a collection of standalone components.

At EKG (Malaysia) SDN BHD, we specialize in "System-Level" optimization that targets the three primary sources of energy waste: mechanical transmission, thermal leakage, and air-path resistance.

1. The IE5 EC Fan Array Strategy

The fan motor is the highest energy consumer within an Air Handling Unit (AHU). Standard AC motors with belt drives are inherently inefficient due to friction and slippage.

• Direct-Drive Integration: We utilize IE5-rated Electronically Commutated (EC) motors. By mounting the impeller directly onto the motor shaft, we eliminate the 5–12% energy loss associated with pulleys and belts.

• Modular Fan Walls: Instead of one large motor, we use an array of smaller EC fans. This allows for N+1 redundancy and permits the system to operate at peak efficiency even during part-load conditions (e.g., after office hours), which is critical for lowering BEI.

2. High-Efficiency Thermal Envelopes

Low energy design requires that the "coolth" generated by the system reaches the occupant with zero thermal migration.

• TB2 Thermal Breaks: We utilize Double-Skin AHU casing with integrated non-metallic thermal breaks. This prevents "cold bridging," eliminating external condensation and heat gain from the mechanical room.

• L1-Class Airtightness: Under the MS 1525 standard, air leakage is a major "parasitic" load. We engineer our units to L1-class leakage (the highest global standard), ensuring 100% of the treated air is delivered to the target zone.

3. Total Enthalpy Recovery Loops

In Malaysia’s tropical climate, cooling hot, humid "Fresh Air" accounts for up to 30% of the total AC energy load.

• Thermal Recycling: We integrate Enthalpy Recovery Wheels (ERW) that use the cool, dry exhaust air from the building to pre-condition the incoming outdoor air. This "free" pre-cooling reduces the required chiller tonnage and significantly lowers the daily electrical peak demand.

4. Comparison: Standard vs. Low Energy AC Design

5. Digital Infrastructure & EnMS Integration

Under the Energy Efficiency and Conservation Act 2024, energy savings must be verifiable.

• Demand-Controlled Ventilation (DCV): We utilize CO2 sensors to modulate fresh air intake. If a meeting room is empty, the system automatically ramps down, ensuring energy is never wasted on "over-cooling" unoccupied spaces.

• Smart VSD Modulation: Every motor is equipped with a Variable Speed Drive (VSD) that communicates with the building’s Energy Management System (EnMS) via BACnet IP, providing the real-time data required for mandatory energy audits.

Why Partner with EKG (Malaysia) SDN BHD?

• Technical Integrity: We provide the SFP calculations and BEI impact reports required by Registered Energy Managers (REM) for statutory 2026 reporting.

• 3D BIM Coordination: Our 3D modeling process ensures that the "Golden Path" for airflow—the key to low energy consumption—is preserved during installation.

• BOMBA-Compliant Safety: All low-energy materials, including high-performance insulation and acoustic liners, are fire-rated (Class 0 or B1).

Is your building's HVAC infrastructure prepared for the 2026 energy star-rating audits? Contact EKG (Malaysia) SDN BHD today. We specialize in engineering AC systems that are silent, maintainable, and ultra-efficient.