The MS 1525:2024 (Code of Practice on Energy Efficiency and the Use of Renewable Energy for Non-Residential Buildings) represents the latest Malaysian standard for sustainable building design. For Air Handling Units (AHUs), this standard serves as the technical backbone for the Energy Efficiency and Conservation Act (EECA) 2024 compliance.
Under MS 1525:2024, an AHU is no longer viewed as a standalone box but as a critical component of the building’s Energy Intensity (BEI). At EKG (Malaysia) SDN BHD, we align our retrofitting protocols with these updated parameters to ensure your assets are audit-ready for the 2026 regulatory cycle.
The 2024 revision tightens several mechanical and thermodynamic thresholds that dictate how an AHU must be configured.
MS 1525:2024 sets the maximum allowable electrical power for fans per unit of air moved.
The Target: For most commercial AHU systems, the SFP must not exceed 1.1 kW/m³/s for new installations, and retrofits should target a limit of 1.6 kW/m³/s.
EKG Implementation: We utilize IE5 EC Fan Walls which typically achieve an SFP between 0.6 and 0.9 kW/m³/s, comfortably exceeding the MS 1525 requirement.
To minimize energy waste through the casing (and prevent "The Sponge Effect"), MS 1525 emphasizes the thermal integrity of the AHU enclosure.
Thermal Transmittance (U-Value): The casing must provide high thermal resistance (Class T2 or better).
Thermal Bridging (TB): The standard requires TB2-rated thermal breaks to prevent condensation in Malaysia's 90%+ humidity.
The code mandates that any fan motor with a rated output of 5 kW or more must be equipped with variable speed control to allow for Demand Controlled Ventilation (DCV).
We transition legacy AHUs into MS 1525:2024 compliant platforms through a 4-stage structural reset.
| MS 1525 Parameter | EKG Modernization Action | Performance Outcome |
| Air Leakage | Structural reinforcement to ATC 6 (Class L1). | Eliminates "invisible energy theft" through panel seams. |
| Insulation | Replacing fiberglass with Fiber-Free Closed-Cell cores. | Maintains design R-value and prevents microbial growth. |
| Fan Efficiency | Transitioning from belt-drive to Direct-Drive EC Fan Walls. | Removes transmission losses and hits statutory SFP targets. |
| Control Logic | Integration of NDIR $CO_2$ sensors and BMS syncing. | Modulates airflow based on occupancy to slash $kWh$ waste. |
Adhering to MS 1525:2024 is the primary mechanism for passing mandatory 2026 building audits in Malaysia.
EECA 2024 Alignment: The Energy Commission (Suruhanjaya Tenaga) uses MS 1525 as the technical yardstick for energy audits.
GITA Sustainability: Because our retrofits strictly follow MS 1525:2024 standards, they qualify as recognized "Green" interventions under the 100% Green Investment Tax Allowance (GITA).
DOSH (JKKP) 2026: MS 1525 also factors in Indoor Air Quality (IAQ). Our use of Silver-Ion (Ag+) antimicrobial liners ensures you meet the health side of the standard, keeping microbial counts below 1000 CFU/m³.
Technical Integrity: We are mechanical and T&C specialists. We focus on the thermodynamic and structural stabilization of your assets.
Audit-Ready Reporting: Following every modernization, we provide an MS 1525:2024 Compliance Report, which serves as your building’s "Proof of Performance" for the Registered Energy Manager (REM).
ESG Valuation: Upgrading to the latest Malaysian standard significantly enhances the asset value and ESG profile of office towers in Kuala Lumpur.
Is your AHU inventory currently a compliance liability, or are you ready to transition to the high-performance MS 1525:2024 platform?
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