Smoke Spill Fan & AHU Integration: Statutory Standards 2026

In the 2026 Malaysian regulatory framework, the integration of Smoke Spill Fans and Air Handling Units (AHU) is a critical life-safety protocol. Governed by MS 1780:2017/2026 and the Uniform Building By-Laws (UBBL) 2026, the system must ensure that during a fire, comfort-cooling assets (AHUs) do not interfere with the active extraction of toxic smoke (Smoke Spill Fans).

At EKG (Malaysia) SDN BHD, we engineer this integration to ensure your building remains Sterile, Silent, and Statutory-Compliant.

1. The Statutory "Kill & Kick" Logic

The integration operates on a synchronized "Kill-Signal" and "Kick-Signal" protocol interlocked with the building's Fire Alarm Monitoring System (FAMS).

• The Kill-Signal (AHU): Upon detection of smoke by the Duct Smoke Detectors, the AHU must trigger an Automatic Fire Signal AHU Shut-off. This prevents the unit from acting as a "smoke pump" that recirculates toxic fumes throughout the fire compartments.

• The Kick-Signal (Smoke Spill): Simultaneously, the Smoke Spill Fan receives a signal to ramp up to 100% capacity. It must extract a minimum of 10 Air Changes Per Hour (ACH) as per MS 1780.

   

• Interlock Integrity: These signals must be hard-wired to the Variable Speed Drive (VSD). Software-only interlocks via a Building Management System (BMS) are typically rejected during a BOMBA Safety Permit audit.

2. Engineering the Air-Path Integration

For the smoke spill fan to extract effectively, it often shares ductwork or plenums with the AHU system. This requires specialized hardware to maintain fire compartmentation.

3. Pressure Differential & Door Opening Forces

A common integration failure is creating a "vacuum effect." MS 1780 and MS 1472 specify that the smoke spill extraction must not make escape doors impossible to open.

• Maximum Force: The door-opening force must not exceed 110 Newtons.

• Balance: If the Smoke Spill Fan is too powerful and the Make-Up Air is insufficient, the negative pressure will "lock" occupants in the fire zone. EKG engineers conduct Static Pressure Calculations to ensure this balance is maintained.

   

4. Verification & Statutory Commissioning

To secure the building's Fire Certificate (FC), the integration must pass a physical witness test by a BOMBA officer:

1. Smoke Visualization Test: Using non-toxic smoke bombs to verify the AHU stops recirculating and the spill fan successfully extracts the smoke.

2. Damper Fail-Safe Audit: Verification that all motorized dampers revert to their required state (closed for AHU, open for Spill Fan) upon loss of mains power.

3. Digital Twin Update: All integration logs and response times are uploaded to the building’s Digital Birth Certificate (LOD 500) for the mandatory 5-year periodic audit.

5. Why Partner with EKG (Malaysia) SDN BHD?

• Technical Integrity: Our integrations are designed by mechanical engineers who specialize in the intersection of thermodynamics and active fire protection.

• BOMBA Readiness: we manage the entire BOMBA Form B and G8/G9 documentation process to ensure your project meets KL/Selangor statutory deadlines.

• GITA Support: Documented compliance with 2026 BOMBA standards is essential for claiming the 100% Green Investment Tax Allowance.

Is your AHU and Smoke Spill integration safe enough to pass a 2026 statutory audit? Contact EKG (Malaysia) SDN BHD today for a specialized Integration Design Review & Commissioning Audit.