In the 2026 Malaysian mechanical sector, Thermal Bridge Factor (TB2) Restoration is a high-level thermodynamic intervention. Under MS 1525:2024 and the Energy Efficiency and Conservation Act (EECA) 2024, the thermal integrity of an AHU casing is a statutory performance metric. A "Thermal Bridge" occurs when highly conductive materials (like steel frames or fasteners) bypass the insulation, creating a direct path for heat to transfer from the warm KL ambient air to the cold internal air stream.
A failure in the Thermal Bridge Factor (moving from TB2 toward TB5) results in localized "sweating," which violates DOSH (JKKP) 2026 hygiene codes and spikes your Building Energy Intensity (BEI).
In the Eurovent and MS 1525:2024 classification systems, the Thermal Bridge Factor ($k_b$) measures how effectively the casing prevents heat conduction through its structural members.
TB2 Rating: Indicates a high-performance thermal break where the temperature difference between the internal and external surfaces is minimized.
The 2026 Mandate: For Grade-A offices and hospitals in Malaysia, TB2 is the minimum requirement to prevent condensation in 90%+ relative humidity.
Energy Impact: Restoring a unit to TB2 standards can reduce casing heat gain by up to 15-20%, directly lowering the load on your chilled water system and improving your Specific Fan Power (SFP) efficiency.
At EKG (Malaysia) SDN BHD, we utilize specialized materials to "decouple" the casing and restore the thermal barrier.
| Restoration Phase | Engineering Action | Purpose |
| Frame Decoupling | Installation of high-density polyamide or PVC thermal break profiles. | Breaks the metal-to-metal contact between inner and outer skins. |
| Fastener Isolation | Replacement of standard screws with nylon-sleeved or capped fasteners. | Prevents "Pin-Point" condensation at every screw head. |
| Gasket Overhaul | Installation of multi-fin, low-conductivity EPDM seals. | Restores the ATC 6 airtightness and thermal seal at access doors. |
| PU Injection | Re-filling hollow frame sections with high-density, fire-rated PU foam. | Eliminates air pockets that facilitate convective heat transfer. |
The EKG approach focuses on the psychrometrics of the casing surface to ensure it stays above the dew point.
Thermal Imaging Audit: We utilize FLIR thermal imaging to identify "Cold Spots" where the thermal bridge is failing. Restoration is targeted at these specific conduction paths.
Laminar Flow smoothing: For internal body restoration, we ensure that the thermal break profiles are flush with the Double-Skin Panels. This prevents air turbulence that can "strip" the boundary layer and increase heat transfer.
Vapor Barrier Continuity: We utilize seamless elastomeric membranes to seal the external interfaces of the thermal breaks, ensuring KL’s moisture cannot bypass the restored barrier.
Restoration materials must satisfy the life-safety requirements of BOMBA (JBPM) 2026.
Class 0 Certification: All thermal break materials and isolation gaskets are certified Class 0 (BS 476 Part 6 & 7). This ensures the casing remains smoke-tight and non-combustible.
Structural Resilience: The TB2 restoration is engineered to withstand the sudden pressure surge that occurs during an Automatic Fire Signal AHU Shut-off, ensuring the casing does not "de-laminate" or fail structurally.
BOMBA Audit: JBPM officers verify the fire-retardant markings of casing components during the annual Fire Certificate (FC) walkthrough.
Technical Integrity: We are mechanical and T&C specialists, not just general insulators. We calculate the $U$-value and $k_b$ factor to ensure your unit meets its design specifications.
Audit-Ready Reporting: Following restoration, we provide a Thermal Bridge & Condensation Risk Validation Report, essential for your Registered Energy Manager (REM).
BEI Optimization: By achieving TB2 compliance, we help your facility maintain its Energy Intensity Star Rating, avoiding the statutory penalties of the 2024 Energy Act.
Is your AHU "sweating" at the seams or failing its energy audit?
Contact EKG (Malaysia) SDN BHD today for a professional TB2 Casing Restoration & Statutory Compliance Audit.
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