Retrofitting & Low Emission Zones

Retrofitting means equipping a vehicle or machine already in traffic with an effective exhaust aftertreatment device. Low Emission Zones (LEZ) are areas that require vehicles and machines vehicles to meet certain levels of exhaust emissions (e.g.  certainEuro classes) before they are allowed to drive inside the zone. Today´s international emission standards for on- and off- road machines and vehicles guarantee, that new machines meet the requirements of health and safety legislation. However, it is the older machinery operating  with either basic or no exhaust aftertreatment devices that is responsible for polluting the local air.

Long-term exposure to diesel engine pollutants, particulate matter (PM) and nitrogen oxides (NOx) adversely affect human health, causing cardiovascular and respiratory diseases and even premature death.

NOxBUSTER City DPF+SCR
NOxBUSTER for city driving
NOxBUSTER City upgrades up to Euro 6

Low Emission Zones

In order to improve the air quality, many cities worldwide have implemented so-called Low Emission Zones (LEZ) or Environmental Zones (E-Zones), that require diesel machines and vehicles to meet certain levels of exhaust emissions before they are allowed to drive inside the zone. In some low emission zones, vehicles with higher emissions have to pay more if they wish to enter the zone.

Retrofitting - fast and cost-effective

The polluting vehicles can retrofitted with efficient exhaust gas aftertreatment devices: diesel particulate filters and SCR systems, for instance. Retrofitting is the fastest, most cost-effective way to improve air quality and reduce environmental, financial and health impacts –direct and indirect – in the short term. For the amount of money spent on just 1 new bus, 20 existing buses can be retrofitted. The most effective retrofit devices, combining both diesel particulate filters (DPF) and selective catalytic reduction (SCR) systems, reduce PM and NOx emissions to the EURO 6 level (valid emission standard for new vehicles).

Proventia's proven results from global retrofit projects in major Asian and US cities, as well as in European Low-Emission Zones has established us as an expert in retrofitting projects globally. We have supplied retrofit devices for a number of air quality projects worldwide including various mobile source applications e.g.  mining and materials handling and construction machines, as well as on-road vehicles like trucks and buses. Our diesel retrofit technologies have proven their ability to significantly reduce unwanted emissions at a reasonable cost.

Systematic uses of retrofit exhaust aftertreatment devices allow older vehicles and machines to operate in an environmentally friendly manner, meeting the strictest emission limits.

Our strengths

  • Over 20 years of experience in retrofits
  • The innovations and technologies for OE applications can be utilised in retrofit systems as well.
  • Reliable,  easy to use systems with supplementary services, e.g. filter servicing and emission monitoring
  • Proven results from global retrofit projects
  • Verified by independent testing laboratories
  • Approved by local authorities, e.g. Transport for London, Swedish Environmental Zones