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Extraction fan & forced air

Chimneys and silencers for extraction fans, ovens, purifiers, thermal power stations

Silent fireplaces

Silent chimneys for the boiler room of the Parliament buildings and Supreme Court of Canada, Ottawa.

Silencieux hybride

Hybrid silencer in extraction fan duct. The absorptive module reduces wide frequency range noise. The responsive module reduces noise at the predominant frequency.

silencieux absorptif

Absorptive silencer, with very low air resistance, inserted and suspended at the end of the chimney.


Silencer-chimney, hybrid with sealed membrane anti-clogging by gas particles.

Absorbent silencer in chimney
Absorbent silencer in chimney

Absorptive silencer in chimney or combustion gas duct, up to 500°C, with independent internal expansion, anti-explosion and thermo-acoustic coating.

High flow axial fan
Silencer for Axial Fan

Underground mine axial fan silencer, in a prefabricated soundproof building.

Silencer for axial fan
Silencer for axial fan
Gas turbine
Gas Turbine Silencers and Chimneys

Exhaust silencer and noise shield for heat recovery and steam generator (HRSG).

Thermo-acoustic chimney, silencers, guides and noise barriers for emissions control system (SCR).

Silencieux d’échappement et écran antibruit
gas turbine
Thermo-acoustic fireplace, silent
Steam vent & compressor
Vent Silencers
Steam silencer

Steam silencer

module haute pression

High pressure module

silencieux de compresseur

Compressor silencer

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Low pressure module

Vacuum pump, blower
Silencer for Blower & Vacuum Pump
Silencer for blower & vacuum pump
Diesel generator
Silencer for Diesel Generator
Silencer for diesel generator
Test bench, wind tunnel
Silencer for Wind Tunnel and Engine Test Bench
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Other ventilation
Silencer - Other Commercial Industrial Ventilation

Exhaust silencer – 8,000 CFM dust collector

dust collector 8,000 CFM
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chimney with sealed anti-clogging cartridges

Quiet – chimney with sealed anti-clogging cartridges. They can be replaced from the side or from above.

Acoustic louvers for air intake

Acoustic louvers for air intake
Acoustic louvers for air intake
DirECTING NOZZLES, diffusers, expansion joints & others
Other Gas Flow Devices
Devices at the end of the chimney
Devices at the end of the chimney

Devices at the end of the chimney

Expansion joint for chimney and hot ducts

Expansion joint for chimney and hot ducts
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Exhaust gas diffuser

Gas Flow Guidance and Screener

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Silentec Support Engineering

Support Engineering

Silentec works with the customer and their consultant to formulate the optimum solution and to certify/guarantee the aero-thermo-acoustic performance.  Various numerical simulations and factory/laboratory tests are used, as required, including :

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Measurements taken in the chimney of gas noise-pressure-velocity profiles.

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Tests on a scale model, to optimize the design/aeroacoustic performance of chimney-silencers and other devices.

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Tests to prove the aeroacoustic performance of silencers, carried out on a full-scale test bench, with a 65,000 CFM fan.

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Simulation of pressure drops and velocity profiles in chimney pipes and in the environment, with and without guideways, silencers and devices at the end of the chimney.

Guidance at chimney entrance

Directing nozzles at chimney inlet and pressure gain.

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Silencer baffles, gas velocities, turbulence noise and pressure loss.

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Chimney end cone, plume and dispersion of gases in the environment.

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Chimney flue design with lower noise and flow resistance.

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Detail drawings and structural calculation of chimney.

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Thermal stresses and buckling by exhaust gases during start-up.

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Design calculations for thermo-acoustic insulation and independent expansion of the internal-external walls of chimney ducts.

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Are You Looking to Reduce Noise and Optimize Gas Flow?

Our solutions are reliable and used in factories, mines, power plants, air quality systems and industrial and commercial ventilation.

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