In the most demanding controlled environments—such as nanotechnology fabrication, high-level biosafety labs (BSL-3/4), and advanced pharmaceutical manufacturing—HEPA (High-Efficiency Particulate Air) and ULPA (Ultra-Low Penetration Air) integrated AHUs are the primary engines of sterile air production.
Under the Energy Efficiency and Conservation Act (EECA) 2024, the mechanical challenge is overcoming the massive static pressure "tax" these filters impose. To maintain a Building Energy Intensity (BEI) within 2026 statutory limits, the AHU layout must be aerodynamically perfect to prevent the fan from wasting energy.
While both provide terminal-grade air purity, the choice depends on the specific ISO 14644 class of the cleanroom.
HEPA H13/H14: These are the clinical standard, removing 99.97% to 99.99% of particles down to 0.3 microns. They are primarily used in surgical theaters and general pharmaceutical production.
ULPA U15/U16/U17: These are used in "Ultra-Clean" environments like semiconductor wafer fabs (ISO Class 1-3). They remove 99.999% to 99.9999% of particles down to 0.12 microns.
Integrating these filters requires a robust casing and a high-performance drive system. A standard AHU will fail under the suction and discharge pressures required for ULPA filtration.
L1-Class Airtight Casing: In HEPA/ULPA systems, "bypass leakage" is the enemy. Even a 0.01% leak around a filter frame can ruin a cleanroom's certification. Our units feature dual-compression gaskets and precision-welded filter frames to ensure 100% of the air passes through the media, not around it.
IE5 EC Fan Wall Technology: HEPA filters can double the total system static pressure. We utilize Direct-Drive EC Fan Arrays that can generate 1,500 Pa to 2,500 Pa while maintaining an SFP below 1.1 $kW/m^3/s$. The modular nature of the array provides N+1 redundancy, ensuring the cleanroom never loses its pressure regime.
| Metric | HEPA Integrated AHU | ULPA Integrated AHU |
| Typical Efficiency | 99.99% @ 0.3 $\mu m$ | 99.9999% @ 0.12 $\mu m$ |
| Pressure Drop ($\Delta P$) | 250 - 500 Pa | 500 - 800+ Pa |
| Typical ISO Class | ISO 5 - 8 (Hospital/Pharma) | ISO 1 - 4 (Microchips/Nano) |
| Casing Standard | L1 Leakage / TB2 | L1 Leakage / TB2 / Low Outgassing |
| Drive Requirement | High Torque EC | Ultra-High Static EC Array |
| Monitoring | Differential Pressure | Real-Time Particle Tracking |
To meet EECA 2024 energy targets while pushing air through dense ULPA media, EKG (Malaysia) SDN BHD optimizes the airflow path:
3D BIM Path Coordination: We model the discharge plenum to ensure a perfectly Laminar Flow profile. Turbulence at the filter face causes "Spot Loading," which clogs the filters prematurely and spikes energy consumption.
Digital Pressure Reset: Our units utilize high-precision transducers that communicate with the Energy Management System (EnMS). As the filters load up with dust, the system incrementally ramps the fan speed to maintain the exact airflow needed, avoiding the "over-blowing" energy waste common in manual systems.
Filter integrity is subject to strict annual validation under MOH and ISO standards.
DOP/PAO Test Ports: Every EKG integrated unit includes built-in ports for Dispersed Oil Particulate (DOP) testing. This allows for rapid, "leak-free" validation of the filter seals without breaking the AHU's primary enclosure.
TB2 Thermal Integrity: Our double-skin TB2 casing prevents external sweating. In high-precision labs, any moisture on the unit's exterior is a contamination risk and a sign of energy inefficiency that will be flagged in a 2026 energy audit.
Technical Integrity: We provide the Validation Documentation (IQ/OQ) and Filter Leak Test Reports required for cleanroom certification.
Precision Engineering: Our systems are designed for the most sensitive manufacturing processes, ensuring zero downtime and maximum yield.
BOMBA-Compliant Safety: All materials, including high-performance gaskets and acoustic liners, are fire-rated (Class 0 or B1).
Is your high-purity infrastructure prepared for the 2026 energy and purity audits? Contact EKG (Malaysia) SDN BHD today. We specialize in engineering HEPA and ULPA integrated systems that are sterile, silent, and ultra-efficient.
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