Log in to access members-only content

Supporting NOx reduction through retrofit

The LowCVP has been working with the Joint Air Quality Unit (Defra & DfT), vehicle operators and retofit manufacturers to drive the uptake of Euro 6 / VI equvalent retrofit technologies to reduce harfmul air pollutant emissions from diesel vehicles.

Clean Vehicle Retrofit Technology Guide

To help operators and local authorities understand the opprotunities for retrofit and the relevant funding schemes, the LowCVP has created the Clean Vehicle retrofit Technology Guide. The guide touches on UK air qualtiy policy and funding streams, the accrediation of retrofit technologies and how they work to reduce harmful NOx from the existing vehicle park.

Clean Air Zones, Retrofit and the Clean Vehicle Retrofit Accrediation Scheme

Air quality improvement is a keen focus for towns and cities across the UK, with a view to meeting national air quality objectives for NO2 concentraions that are currently being exceeded. Some authorities have chosen to meet this challenge by introducing Clean Air Zones (England) or Low Emission Zones (Scotland), which stipulate emissions standards for vehicles entering these zones. These standards are typically Euro 4/IV for petrol and Euro 6/ VI for diesel vehicles.

Retrofit technologies have been identified as one of the most cost effective solutions to reducing NOx emissions from buses in UK fleets. To ensure quality and that retrofit technologies meet Euro VI equivalent standards, LowCVP have supported the Energy Savings Trust in creating the Clean Vehicle Retrofit Accreditation Scheme (CVRAS) to ensure that retrofit technologies that operate within these zones are as good as new Euro VI vehicles.

As part of our work, LowCVP has collected data from bus operators opreating in confirmed and potential areas identified as Clean Air Zones. This data includes bus models, engine types and Euro standards with the aim of identifying the most common models in the market and help manufacturers develop and accredit relevant solutions.

Combined datasets for England and Scotland

LowCVP analysis presentation

Excel Spreadsheet

Useful Links

Energy Savings Trust - Clean Vehicle Retrofit Accreditation Scheme

Host page of EST for CVRAS containing list of approved systems and test protocols for CVRAS.


A member view...

The acceptance of so many significant changes in technology have mainly been driven and brought about by the dedication of the LowCVP.
Alan Martin, Baumot