Expertise in innovative road and rail infrastructure
Call us +44 (0) 1275 818008

NOx Filters

Latest News

Crown showcases clean air innovations at Highways UK Smart city road and rail safety manufacturer Crown International will showcase its new range of air-quality improvement infrastructure at this year’s Highways UK show (Stand...

(more...)

Crown International wins £352,000 Balfour Beatty and VINCI contract Crown International has secured a £352,000 contract with Balfour Beatty and VINCI Construction Grands Projects to supply and install Variable Height Dual Unit Enabled PTZ (Pan-Tilt-Zoom)...

(more...)

Crown launches double EV Charge Point

Smart city road and rail safety manufacturer, Crown International, launches its latest cost-saving innovation, a double EV Charge Point offering a seamless kerb-side...

(more...)

Crown Clean Air NOx filters

The Crown Clean Air NOx Filter removes up to 80% of NOx from the atmosphere and is designed  to be cost-effective to install for local councils.

Available in a variety of shapes and sizes to suit different environments and applications, the filters can be deployed as a standalone solution in air pollution hot spots or included as part of Crown’s Clean Air EV charging points.

The filters are currently offered in a range of depths from 20-40mm and can be easily removed, cleaned and reinstalled to ensure optimal performance.

Research-backed applications

Crown’s Clear Air NOx filter technology has been tested by some of the leading universities in the country, including the University of Cambridge and University of Manchester.

Modelling NOx removal of filter ‘hedges’ in London’s Oxford Street

“Crown Clean Air NOx Filters removed NOx concentration between 20 and 35% at pedestrian height (1.5 metres)”

NOx removal using Crown Clean Air Filters vs. Naturally occurring background loss rate

“Crown’s Clean Air NOx Filter removes NOx at a significantly higher rate than the background loss rate”

Effectiveness of Crown Clean Air NOx Filters in vehicle exhausts

“The fact that the current formulae and design of the material have been proved to substantially remove NO2 at a representative range of exhaust flows and temperatures is highly promising and demonstrates that the material has a great potential in the exhaust after-treatment application”

For further information, contact us.