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A Low Leakage Air Handling Unit (AHU) Casing is a critical engineering requirement for high-performance buildings in Kuala Lumpur and Selangor. In the context of the EECA 2024, every liter of treated air that leaks out of an AHU before reaching the occupied zone represents a direct waste of energy and a hit to your building’s Building Energy Intensity (BEI) score.

EKG (Malaysia) SDN BHD specializes in the engineering and installation of AHUs with certified low-leakage casings, ensuring your HVAC system operates at peak mechanical efficiency.

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1. Understanding the Leakage Classification (EN 1886)

International standards, specifically EN 1886, categorize AHU casings based on their airtightness. For a unit to be considered "Low Leakage" in a professional or industrial setting, it should target the highest ratings:

• L1 Class (The Gold Standard): This represents the lowest possible air leakage. L1 casings are virtually airtight, ensuring that the Specific Fan Power (SFP) is not wasted on pressurized air escaping into the mechanical room.

• L2 and L3 Classes: These are standard or economy-grade ratings. While common, they often result in significant "parasitic" energy loss over the 15-year lifespan of the unit.

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2. Technical Features of Low Leakage Construction

To achieve an L1 leakage rating, EKG utilizes several key construction techniques:

• Double-Skin Pentapost Framework: We use a rigid, reinforced aluminum or galvanized steel framework with interlocking panels. This "pentapost" design ensures the casing does not deform under high static pressure, which is a common cause of leaks in lower-quality units.

• High-Compression Gasketing: We utilize EPDM or specialized closed-cell gaskets at every panel joint. These gaskets are UV-resistant and designed to maintain a seal even after years of thermal expansion and contraction in Malaysia’s heat.

• Precision Door Seals: Access doors are the most common leak points. Our low-leakage units feature laboratory-grade hinges and multi-point compression latches that pull the door tight against a seamless gasket.

• Airtight Component Sleeves: All penetrations—such as pipe headers for cooling coils and electrical conduits for the EC Plug Fan—are fitted with specialized airtight sleeves or grommets.

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3. Strategic Importance for EECA 2024 and MS 1525

A low-leakage casing is not just about "saving air"; it is about protecting your building's star rating:

• Protecting the BEI Score: If 5% of your air is leaking into a non-occupied mechanical room, your chiller and fans are working 5% harder for no benefit. In a large commercial facility, this can be the difference between a 3-Star and a 2-Star energy rating.

• Preventing Condensation and Mold: In Malaysia's high humidity, cold air leaking into a warm mechanical room causes immediate condensation ("sweating"). A low-leakage casing keeps the cold air contained, preventing mold growth and structural damage.

• SFP Compliance: To stay below the MS 1525 limit of 1.6 kW per cubic meter per second, your fan must be as efficient as possible. Casing leaks artificially inflate the required fan power, making compliance much harder to reach.

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Comparison: Standard vs. EKG Low Leakage Casing

Feature	Standard Casing (L3)	EKG Low Leakage (L1/L2)
Leakage Rate	High (Up to 5% of airflow)	Ultra-Low (< 1% of airflow)
Energy Waste	Constant "Parasitic" Loss	Minimal / Optimized
Humidity Risk	High (External Sweating)	Eliminated (Dry Mechanical Room)
Star Rating Impact	Negative / High BEI	Positive / Lower BEI
Sealing Tech	Basic Silicone / Foam	EPDM / High-Compression Gaskets

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Why Partner with EKG (Malaysia) SDN BHD?

• Technical Integrity: We don't just "supply" a box. We provide the certified leakage test reports required by your Registered Energy Manager (REM) for mandatory EECA 2024 compliance.

• 3D BIM Coordination: We use 3D modeling to ensure your AHU is positioned with enough service clearance so that access doors can be properly latched and maintained to preserve their airtight seal.

• BOMBA-Compliant Materials: All casing insulation and gaskets are vetted for fire safety (Class 0 or B1) to ensure your "airtight" unit is also a safe unit.

Is your AHU wasting energy before the air even leaves the unit? Contact EKG (Malaysia) SDN BHD today for a technical casing audit and a proposal to modernize your HVAC infrastructure into a high-performance, compliant asset.