In the 2026 Malaysian high-rise landscape, Smoke Spill AHU Solutions (Mechanical Smoke Extraction) are specialized mechanical systems governed by the Uniform Building By-Laws (UBBL) 2026 and MS 1780:2017/2026. Unlike standard AHUs that shut down during a fire, Smoke Spill systems are engineered to perform under extreme thermal loads to extract toxic fumes from lobbies, corridors, and large floor plates, ensuring safe passage for occupants.
At EKG (Malaysia) SDN BHD, we design these systems to be Sterile, Silent, and Statutory-Compliant, bridging the gap between comfort cooling and life-safety extraction.
Under the 2026 regulations, a clear distinction is made between Smoke Purging (clearing smoke post-fire) and Smoke Spill (active extraction during a fire).
Extraction Rate: Smoke spill systems must achieve a minimum of 10 Air Changes Per Hour (ACH) for the affected fire zone to maintain tenable conditions.
Temperature Integrity: Fans and housing must be certified to operate at 250°C for a minimum of 120 minutes (FRP 120).
BOMBA Safety Permit: A dedicated permit is required for smoke spill systems, involving a comprehensive witness test that verifies the system's ability to maintain negative pressure in the fire zone while protecting escape routes.
A high-rise smoke spill solution requires hardware that goes beyond standard HVAC specifications.
| Component | Smoke Spill Requirement | Engineering Purpose |
| High-Temp Motor | Class H Insulation / IP55 | Prevents the motor from seizing or burning out at 250°C. |
| Fire-Rated Ducting | MS 2586:2026 (1.2mm min) | Prevents duct collapse and smoke leakage into "safe" zones. |
| Variable Frequency Drive (VFD) | Dedicated "Fire Mode" | Bypasses internal motor protections to keep the fan running until failure. |
| FR Cabling | MS 2116 Class C | Ensures power supply is maintained throughout the evacuation window. |
In a high-rise fire event, the EKG Smoke Spill Protocol follows an automated sequence:
Fire Signal Trigger: The Fire Alarm Monitoring System (FAMS) detects smoke and sends a signal to the BMS/Fire Panel.
AC Shutdown / Spill Initiation: Standard AHUs in the building trigger an Automatic Fire Signal AHU Shut-off, while the Smoke Spill fan ramps up to 100% capacity.
Make-Up Air Interlock: To prevent a "vacuum" effect—which would make fire doors impossible to open—the extraction fan is interlocked with Motorized Fresh Air Louvers to introduce replacement air.
Pressurization Balance: In KL high-rises, this works with Stairwell Pressurization Systems (governed by MS 1472) to keep escape stairs smoke-free.
Technical Integrity: We perform the complex Static Pressure Calculations required to ensure the extraction fan overcomes the resistance of fire-rated ducting and dampers.
BOMBA Readiness: We conduct Smoke Visualization Tests to prove the effectiveness of the extraction path before the official BOMBA witness test.
EECA 2024 Alignment: While life-safety is paramount, we utilize high-efficiency axial fans that meet energy benchmarks during non-emergency "Air Purge" cycles.
GITA Support: Documentation of your smoke spill system’s compliance is a critical artifact for claiming the 100% Green Investment Tax Allowance.
Is your high-rise smoke spill system a life-safety asset or a statutory liability? Contact EKG (Malaysia) SDN BHD today for a specialized High-Rise Smoke Control Audit & Design.
Are you designing the smoke spill system for a new residential high-rise or a commercial Grade-A office tower?
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