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Low BEI AHU Layout: Small Footprint Design

In high-density urban developments throughout Kuala Lumpur and Selangor, mechanical room space is often extremely limited. However, under EECA 2024, reducing the physical footprint of an Air Handling Unit (AHU) must not compromise the Building Energy Intensity (BEI). A Small Footprint AHU utilizes vertical stacking and advanced materials to minimize floor area while maintaining the thermal and aerodynamic performance required for a 4-star or 5-star energy rating.

At EKG (Malaysia) SDN BHD, we engineer compact layouts that prove "smaller" can be significantly more efficient through precision 3D BIM Coordination.

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1. Vertical Stacking Logic

The most effective way to reduce the footprint ($m^2$) is to shift the layout from horizontal to vertical.

• Integrated Vertical Fan Arrays: Instead of a single large motor that requires a long horizontal discharge section, we utilize a compact IE5 EC Fan Array. Because these are direct-drive, we can stack multiple fan modules vertically, shortening the unit's total length by up to 35%.

• Tiered Component Arrangement: We stack the Enthalpy Recovery Wheel (ERW) above the cooling coil section. This "Over-Under" configuration allows the unit to treat fresh air and recirculated air within the same vertical column, maximizing the use of ceiling height.

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2. Double-Skin "Thin-Wall" Technology

A small footprint is supported by the casing design. Traditional single-skin units with bulky internal insulation waste valuable external space.

• TB2 High-Density Panels: We utilize 50mm double-skin panels with a high-density PU foam core. This provides superior thermal resistance ($R$-value) in half the thickness of traditional glass-wool insulation.

• Thermal Break Continuity: The TB2 rating ensures that even in a cramped, humid mechanical room, the unit will not "sweat." This allows the AHU to be placed closer to walls or other equipment without risking moisture damage or corrosion.

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3. Comparison: Standard vs. Small Footprint AHU

Metric	Standard Horizontal AHU	EKG Small Footprint AHU
Footprint Area	100% (Baseline)	60% - 65% (Space Optimized)
Drive System	Belt-Driven AC (Long)	Direct-Drive EC Array (Compact)
SFP Performance	1.8 - 2.5 $kW/m^3/s$	< 1.1 $kW/m^3/s$
Casing Rating	L3 Leakage	L1 Airtight (Precision Sealed)
Mounting	Floor Mount only	Floor or Multi-Tier Stacked

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4. BIM-Optimized Serviceability

Small footprints often lead to maintenance nightmares. We solve this by using 3D BIM Coordination to ensure "compact" remains "serviceable."

• Single-Side Access: We engineer the layout so that all filters, motors, and coils are accessible from one side only. This allows the unit to be pushed flush against a back wall, reclaiming up to 1.0 meter of room width.

• Modular Component Removal: Every component in a small footprint EKG AHU is designed to be removed through the standard access doors without dismantling the main casing, ensuring long-term EECA 2024 compliance through easy maintenance.

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Why Partner with EKG (Malaysia) SDN BHD?

• Technical Integrity: We provide the SFP and BEI impact reports required by Registered Energy Managers (REM) to prove that your compact unit still meets mandatory efficiency targets.

• Precision Fabrication: Our units are built to L1-class leakage standards, ensuring that a smaller unit doesn't lead to "parasitic" energy loss.

• BOMBA-Compliant Safety: All compact insulation materials and gaskets are fire-rated (Class 0 or B1).

Is your mechanical room space preventing you from upgrading to high-efficiency equipment? Contact EKG (Malaysia) SDN BHD today. We specialize in engineering small footprint layouts that maximize performance and minimize your building's energy intensity for full 2026 compliance.