Clean Air HVAC

Cleanroom & Hospital Grade AHU Specifications: Clean Air HVAC

In the technical landscape of 2026, "Clean Air HVAC" refers to systems engineered for environments where air purity is a non-negotiable metric—such as pharmaceutical labs, semiconductor plants, and surgical suites. Under the Energy Efficiency and Conservation Act (EECA) 2024, these systems must deliver "Surgical Grade" air while maintaining a low Building Energy Intensity (BEI), despite the high static pressure required by advanced filtration.

At EKG (Malaysia) SDN BHD, we design Clean Air HVAC systems that prioritize pathogen elimination, particle control, and aerodynamic efficiency.

1. The Clean Air Filtration Hierarchy

Clean air is achieved through a multi-stage process that progressively removes smaller contaminants without unnecessarily spiking the Specific Fan Power (SFP).

• Primary Stage (G4/F7): Captures large particulates and dust to protect the high-performance coils and final filters.

• Secondary Stage (F9/E10): Removes fine atmospheric dust and larger microbial carriers.

• Final Stage (H13/H14 HEPA): The "High-Efficiency Particulate Air" filter. These are certified to remove 99.97% to 99.99% of particles down to 0.3 microns. In cleanroom layouts, these are often placed at the room terminal to ensure no duct-born contaminants enter the sterile zone.

2. Germicidal & Biological Neutralization

Clean air is about more than just particle count; it is about biological sterility.

• UV-C Germicidal Irradiation (UVGI): We integrate UV-C lamps (254nm) that bathe the cooling coils and drain pans. This destroys the DNA of viruses and bacteria, preventing "bio-fouling" on the coils and ensuring the air remains sterile as it passes through the unit.

• Photocatalytic Oxidation (PCO): For labs and industrial sites handling Volatile Organic Compounds (VOCs), PCO modules use UV light and a catalyst (typically $TiO_2$) to break down odors and chemical vapors into harmless water and $CO_2$.

3. Hygienic Casing & TB2 Thermal Integrity

A "Clean Air" system must not become a source of contamination itself.

• L1-Class Airtightness: To maintain cleanroom standards (e.g., ISO 14644), the AHU casing must be airtight. Our L1-rated construction ensures that unconditioned, unfiltered plant room air is never sucked into the clean air stream.

• TB2 Thermal Breaks: In Malaysia's humidity, "sweating" units lead to external mold. Our TB2 casing physically decouples the inner and outer skins, ensuring the unit stays dry and biologically inert.

• Stainless Steel (SUS 304) Interiors: We utilize non-porous stainless steel internal skins that withstand aggressive sterilization and do not support biofilm formation.

4. Comparison: Standard vs. Clean Air HVAC

5. Aerodynamic Efficiency for High-Pressure Loads

HEPA filters create significant resistance. To keep the SFP below 1.1 $kW/m^3/s$, the layout must be aerodynamically perfect.

• IE5 EC Fan Arrays: We use modular "Fan Walls" that can generate the high static pressure required for HEPA filters while using 30% less energy than traditional belt-driven fans.

• Laminar Flow Transitions: Every bend and transition is engineered using 3D BIM Coordination to ensure air moves in a straight, laminar path, reducing the work the fan has to perform.

Why Partner with EKG (Malaysia) SDN BHD?

• Technical Integrity: We provide the Particle Count Certification and SFP Reports required for both MOH (Ministry of Health) clinical audits and EECA 2024 energy audits.

• Clash-Free BIM Models: We ensure that complex cleanroom filtration systems fit perfectly within your building’s structural limits.

• BOMBA-Compliant Safety: All clinical-grade insulation, seals, and acoustic liners are fire-rated (Class 0 or B1).

Is your facility's air quality meeting the 2026 standards for both health and energy? Contact EKG (Malaysia) SDN BHD today for a technical "Clean Air Audit." We specialize in infrastructure that is sterile, silent, and ultra-efficient.