In the 2026 Malaysian HVAC landscape, the AC Outlet Setup refers to the critical interface where the secondary ductwork meets the terminal device (grille, diffuser, or nozzle). This setup is governed by MS 1525:2024 and SMACNA standards to ensure that the static pressure generated by the VFD-driven AHU is converted into effective, quiet, and balanced airflow.
At EKG (Malaysia) SDN BHD, we engineer outlet setups to eliminate "System Effect" losses, helping your facility maintain its statutory Building Energy Intensity (BEI) targets under the EECA 2024.
A professional outlet setup is more than a simple hole in the duct; it requires a coordinated assembly of components to manage air velocity.
Take-off Fitting (Shoe Leading Edge): We utilize "High-Efficiency Take-offs" with a 45-degree entry or a conical lead-in. This minimizes turbulence at the branch entry, allowing the fan to run at a lower RPM.
Balancing Damper: Every outlet branch is fitted with a Manual Volume Control Damper (VCD) with a locking quadrant. This allows for precise air balancing across the floor, ensuring the "Critical Zone" (the room furthest from the AHU) receives its design airflow.
Flexible Ducting (The Final Link): Used to connect the rigid duct to the plenum box. In 2026, we mandate Insulated R-6.0 Flexible Duct to prevent thermal gain and condensation in ceiling voids.
To satisfy EECA 2024 requirements, the outlet setup must prioritize low-pressure drops to keep the Specific Fan Power (SFP) below 1.6 kW/m³/s.
| Engineering Feature | 2026 Standard | Purpose |
| Max Flex Length | 1.5 to 2.0 Meters | Prevents excessive friction and "sagging" that forces the VFD to ramp up. |
| Bending Radius | 1.5 x Diameter (Minimum) | Ensures smooth airflow and prevents high-frequency "hissing" noise. |
| Plenum Sealing | Mastic & Foil Tape | Eliminates air leakage into the ceiling void (Class 3 Leakage Control). |
| Acoustic Lining | Internal 25mm Lining | Absorbs terminal velocity noise for NC 30-35 compliance. |
For premium Grade-A office developments, EKG utilizes the Cushion Head Plenum setup for all AC outlets. This involves a specialized box that sits above the diffuser.
Velocity Equalization: The CHP acts as a mini-pressure vessel, allowing the air to slow down and equalize before passing through the diffuser blades. This ensures a uniform "Throw" and prevents "Cold Dumping."
Sound Attenuation: The larger volume of the plenum box, combined with internal insulation, acts as a primary silencer for fan-generated noise.
Side vs. Top Entry: We prioritize Side-Entry plenums in restricted ceiling heights to avoid sharp 90-degree bends in the flex duct, which significantly reduces the load on the AHU motor.
The AC outlet setup must comply with BOMBA (JBPM) 2026 fire compartmentation rules, especially when penetrating fire-rated barriers.
Fusible Link Fire Dampers: If the branch duct serves a different fire compartment, a fire damper must be installed at the penetration point.
Intumescent Grilles: In specific fire-rated doors or partitions, intumescent material is used that expands when heated to seal the outlet completely.
BOMBA Audit: JBPM officers will verify the integrity of these outlet seals during the Fire Certificate (FC) witness test to ensure fire and smoke cannot bypass compartmentation through the AC system.
Technical Integrity: Our outlet setups are led by mechanical specialists who use Pitot-tube arrays to verify that each outlet delivers the exact CFM specified in the design.
Acoustic Excellence: We specialize in "Low-Velocity Outlet Design" to ensure that even at 100% AHU capacity, your executive areas remain silent.
EECA Compliance Support: Properly balanced outlets ensure the building's Energy Management System (EnMS) is optimized, preventing the VFD from over-pressurizing the main duct.
Is your AC outlet setup causing uneven cooling or noisy airflow? Contact EKG (Malaysia) SDN BHD today for a specialized Terminal Connection & Air Balancing Audit.
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