Capture, filter, monitor, release.
A proven, integrated system that captures, filters and removes transport pollution at source.
Choose a system.
Polluted air drawn in, captured, cleaned.
The same principle in three settings: capture pollution as close as possible to its source, pull it through a sealed path and filter it before release. Select a stage to see what happens.
Vehicle emissions
Traffic pollution is at its most concentrated right where it is released, at the roadside, where people breathe it in.
Roadvent inlet
Discreet linear slot drains set into the carriageway sit almost flush with the road surface. Cars, cycles and pedestrians pass over them like any other section of road, while they draw in emissions at the point of release.
Air extraction
A central extraction pipe carries the air to a purification cabinet beside the road. Energy-efficient fans pull it through, and speed up as the filters load to hold suction constant.
Filtration
Three stages: electrostatic precipitation, HEPA filtration, then activated carbon to adsorb harmful gases before the air is released.
Monitoring
Every unit has a hardware controller, paired with monitoring software that shows live status, filter condition at each stage and alerts for the maintenance team, over the cabinet’s 4G connection.
Cleaner air
Filtered air is released at the roadside. Independently measured at UTAC Millbrook Proving Ground, Roadvent reduced exposure to vehicle emissions at child face-height by 91%.
Train and track particulates
Braking and track wear fill underground platform halls with fine, iron-rich particulates. Railvent is designed to capture them.
Intake
A curved inlet on the far side of the track draws in polluted air at platform level, close to where the particulates are released, with a mesh guard to keep out large debris. The unit itself sits in the track network beneath the rails.
Filtration
Two stages: an electrostatic precipitator (ESP), then HEPA filtration. Both are withdrawn from the side for servicing.
Air extraction
EC fans draw the air through the unit, and Railvent starts extracting as trains approach.
Monitoring
A connection to the station’s building management system (BMS), with bespoke hardware and software controls.
Cleaner air
Railvent is a recirculating unit: cleaner air is released on the platform side, back into the platform hall. It needs no changes to existing HVAC systems.
Tunnel air
Existing tunnel ventilation fans extract polluted air from the tunnel, as they do today.
Sealed air path
A sealed path and plenum between the fan discharge and the filters makes sure that all of the air passes through them.
Filtration
Arrays of electrostatic precipitator (ESP) collectors capture fine particles with very little resistance, which matters for safety provisions in the event of a tunnel fire. Collectors are swapped out and the used ones taken away to be cleaned.
Monitoring
Monitoring and controls track the condition of the filter arrays, so that collector swaps can be planned.
Cleaner air released
Filtered air leaves through the outlet, so less pollution reaches people living nearby.
Hotspots are where pollutant concentrations are highest, human exposure is greatest, and compliance can be achieved fastest and most cost-effectively. Road, rail and tunnel hotspots share the same pattern: emissions build up, and the space can't dilute them.
Patent protection in 21 territories.
A European patent validated in 18 states, plus the United States, China and Hong Kong.
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Registered office: Manufactory House, Bell Lane, Hertford, SG14 1BP
(+44) 0203 475 8741