TFWA - Tunnel Fan
The TFWA series is a heavy-duty tunnel jet fan engineered for the most demanding longitudinal ventilation applications in road tunnels, metro tunnels, and underground infrastructure. Manufactured from high-quality, corrosion-resistant S355 steel with an epoxy-coated finish and adjustable-pitch aluminum alloy impellers, the TFWA is certified to EN 12101-3 Standard with fire resistance for 2 hours at both 300°C and 400°C — providing the critical thrust-based airflow control and life-safety smoke management required for modern tunnel ventilation systems.
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Areas of Use
The TFWA series is specifically engineered for tunnel ventilation systems where high-thrust, fire-resistant axial jet fans are required to control longitudinal airflow, dilute vehicle exhaust emissions, and manage smoke propagation during fire emergencies. Its robust construction and dual-temperature fire certification make it the correct choice for the most critical underground infrastructure projects. Use these high-performance tunnel fans confidently in:
- Road tunnels and highway underpasses requiring longitudinal ventilation
- Metro and railway tunnels requiring smoke control and emergency ventilation
- Underground infrastructure and utility tunnel ventilation systems
- Long tunnel systems requiring thrust-based airflow induction and control
- Tunnel ventilation projects requiring EN 12101-3 certified fire resistance
Key Features & Specifications
Dual-Temperature Fire Certification — 300°C & 400°C for 2 Hours: Fully compliant with the EN 12101-3 Standard and certified by internationally accredited testing organizations. The TFWA series is guaranteed to operate continuously for 2 hours at 300°C and 2 hours at 400°C — providing the maximum fire resistance certification available for tunnel ventilation applications and ensuring critical smoke control capability throughout any fire emergency.
Heavy-Duty S355 Steel with Epoxy Paint Finish: The robust tubular casing is manufactured from high-quality, corrosion-resistant S355 structural steel and finished with a durable epoxy paint coating — providing exceptional structural integrity and long-term corrosion protection in the harsh, chemically aggressive environment of an active road or metro tunnel.
Adjustable-Pitch Aluminum Alloy Impellers: Equipped with high-efficiency impellers manufactured from special aluminum alloy with fully adjustable blade pitch angles, allowing engineers to precisely calibrate thrust output and airflow velocity to meet the exact longitudinal ventilation and smoke control requirements of each unique tunnel project.
Thrust-Based Longitudinal Ventilation: Operates on the proven longitudinal jet ventilation principle — generating high-velocity air jets that induce large volumes of tunnel air into motion through entrainment. This ductless approach requires no central ventilation shafts, dramatically reducing civil construction costs and maximizing tunnel cross-section utilization.
Bidirectional Operation Available: Available in reversible configurations allowing the same fan to direct airflow in either longitudinal direction — providing maximum operational flexibility for tunnel ventilation strategies that require adaptive smoke control depending on the location and progression of a fire emergency.
Robust Motor Integration — Class H, IP55: Driven by heavy-duty motors with Class H insulation and IP55 protection, rated for S1 continuous duty operation. Manufactured as standard for 380V – 50Hz operation, with custom voltages and frequencies available upon request to suit international tunnel projects.
CFD Analysis Compatible: Tunnel ventilation system designs using the TFWA series can be analyzed and validated using Computational Fluid Dynamics (CFD) according to ASHRAE, BS 7346-7, and NFPA 130 standards — ensuring the ventilation strategy performs as required under both normal and emergency fire scenarios before construction.
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