Our references

With our fine dust filters and gas filters for tunnel systems and underground garages, FILTRONtec is now active on three continents. Our references include:

Air filter system for Central – Wan Chai Bypass in Hong Kong

In 2014, we were commissioned by Highways Department to design, supply, install and commission eight air filtration systems to treat the exhaust tunnel air of the Central – Wan Chai Bypass tunnel located beneath the foreshore of Hong Kong Island.

Basic information:

Client:Highways Department Hong Kong / Leighton Joint Venture
Contract award2014
Handover:Due 2019
Special features:ESP and integrated DeNO2-filters
Air volume flow filters
APS in Ventilation BuildingFlow Capacity
WVB-APS-001250 m3/s
MVB-APS-001250 m3/s
MVB-APS-002125 m3/s
MVB-APS-003125 m3/s
MVB-APS-004125 m3/s total
EVB-APS-001A, 001B, 001C625 m3/s

Additional information:

Homepage of the tunnel operator

Air filter system in the M5-East tunnel in Sydney

In 2004, we were commissioned by the Australian Road and Traffic Authority (RTA) to equip the M5-East tunnel in Sydney with an air filter system, after having emerged as one of the winners from a worldwide technical qualification contest.

In addition to the entire air filter system, we also designed, supplied and installed fans, silencers, fire dampers, as well as the required electrical, measuring and control technology. After successful commissioning, the plant was handed over in April 2010.

Basic information:

Client:Road and Traffic Authority (RTA) / Baulderstone Pty Ltd – Sydney
Qualifying competition:2004
Contract award:2009
Handover:April 2010
Special features:integrierter Gasfilter
Air volume flow fine dust filter:

200 m3/s
Air volume flow Gas filter (switchable):50 m3/s

Additional information:

Air quality measurements near the M5-East tunnel

Description of the filter system

Construction of the filter

Homepage of the tunnel operator

Air filter systems in the tunnel Madrid Calle30 Rio

In the Calle M30 Rio tunnel of the Spanish capital, Madrid, three of our filter plants successfully demonstrate their qualities. In three of the tunnel sections, our systems filter different air volume flows of 50, 200 and 260 3/s.

Basic information:

Client:FCC Construccion, S.A. und ACCIONA Infraestructuras, S.A. , Madrid
Number of projects:3
Deliveries:November and December 2007
Filtered air volume flow50 m3/s; 260 m3/s ; 200 m3/s

Additional information:

Homepage of the tunnel operator:

Pilot filter system at the Elbtunnel, Hamburg

For the Civil Engineering Department of the Freie und Hansestadt Hamburg, we were commissioned in 1994 to plan, construct and test a pilot filter installation at the Elbtunnel. The project was funded by the then Federal Ministry of Education, Research and Technology (BMFT).

Tunneleinfahrt M5East in Sydney


Tunneleinfahrt M5East in Sydney
Luftfilteranlagen im Tunnel Calle M30 Rio

Parklandschaft über Tunnel Madrid
Pilotfilteranlage am Elbtunnel Hamburg

Pilotfilteranlage am Elbtunnel Hamburg