What is the Clean Vehicle Retrofit Accreditation Scheme (CVRAS)?
The CVRAS is a robust certification scheme for manufacturers of retrofit emissions reduction technology that will enable Clean Air Zone (CAZ) compliance of legacy fleet vehicles. This certification scheme supports the operation of Clean Air Zones and addresses the air pollution emissions from buses, coaches, heavy goods vehicles, mini-buses, taxis and vans.
Approved manufacturers and devices
CVRAS approved companies and emission reduction systems.
This listing contains details of companies and their systems approved under the scheme requirements along with their contact information and the categories of vehicle to which their systems can be applied in order to make the vehicle Clean Air Zone compliant.
Contact our Transport Certification team via email or call +44 (0)20 7222 0101 for more details.
CVRAS approved companies
Eminox Ltd
(Gainsborough, UK)
Technology
Retrofit exhaust after-treatment system (SCRT)
Product
Eminox SCRT®
Application status
Approved
Vehicle Category
Buses
Approved vehicle applications
Double Deck Buses
- Cummins ISBe 6.7 litre Euro IV & V powered
- Volvo D5F 4.8 litre Euro IV & V powered
- Volvo D9B 9.4 litre Euro IV & V powered
Single Deck Buses
- Scania DC901 9.0 litre Euro III powered
- Cummins ISBe 5.9 litre Euro III powered
HJS Emission Technology GmbH & Co KG
(Menden, Germany)
UK Representation:
HJS UK Ltd (Bracknell)
Technology
Retrofit exhaust after-treatment system (SCRT)
Product
HJS SCRT 35,36,40, 41 42, 44
Application status
Approved
Vehicle Category
Buses
Approved vehicle applications
Double Deck Buses
- Cummins ISBe 6.7 litre Euro IV & V powered
- Cummins ISBe 4.5 litre Euro IV & V powered hybrid
- Volvo D5F Euro IV & V powered
- Volvo D9B 9.4litre Euro IV & V powered
Single Deck Buses
- Cummins ISBe 4.5litre Euro IV & V powered
Baumot AG
(Konigswinter, Germany)
UK Representation:
Baumot UK Ltd (Towester)
Technology
Retrofit exhaust after-treatment system (SCRT)
Product
Baumot BNOx
Application status
Approved
Vehicle Category
Buses
Approved vehicle applications
Double Deck Buses
- Cummins ISBe 6.7 litre Euro IV & V powered
Single Deck Buses
- Cummins ISBe 4.5litre Euro IV & V powered
- Cummins ISBe 6.7 litre Euro IV & V powered
Proventia Oy
(Oulunsalo, Finland)
UK Representation:
Excalibre Technologies Ltd (Gloucestershire)
Technology
Retrofit exhaust after-treatment system (SCRT)
Product
Proventia NOxBUSTER City™
Application status
Approved
Vehicle Category
Buses
Approved vehicle applications
Double Deck Buses
- Cummins ISBe 4.5 litre Euro V (hybrid)
- Volvo D5F 4.8 litre Euro V Hybrid
Single Deck Buses
- Cummins ISBe 4.5 litre Euro IV & V
- Cummins ISBe 4.0 litre Euro III
Cummins Engine Company Ltd
(Darlington, UK)
Technology
Re-power
Product
Full Cummins Euro VI engine + aftertreatment system
Application status
Application submitted and accepted
Approval in progress
Vehicle Category
Buses
Approved vehicle applications
Double Deck Buses
- To be advised
Single Deck Buses
- To be advised
Magnetic Systems Technology Ltd
(Sheffield, UK)
Technology
Re-power
Product
MagTec electric vehicle drivetrain systems
Application status
Application submitted and accepted
Approval in progress
Vehicle Category
Buses
Approved vehicle applications
Double Deck Buses
- To be advised
Single Deck Buses
- To be advised
Vantage Power Ltd
(Greenford, UK)
Technology
Re-power
Product
Vantage Power B320 Euro VI hybrid system (ft. Cummins ISBe 4.5 Euro VIc)
Application status
Application submitted and accepted
Approval in progress
Vehicle Category
Buses
Approved vehicle applications
Double Deck Buses
- To be advised
Single Deck Buses
- To be advised
GreenUrban Technologies Ltd
(Penrith, UK)
Technology
Retrofit exhaust after-treatment system (SCRT)
Product
ecoNOxt system
Application status
Application submitted and accepted
Approval in progress
Vehicle Category
Buses
Approved vehicle applications
Double Deck Buses
- To be advised
Single Deck Buses
- To be advised
Vehicle Repowering Solutions Ltd (VRS)
(Alcester, UK)
Technology
Re-power and LPG conversion
Product
GasCab
Application status
Application submitted and accepted
Approval in progress
Vehicle Category
Taxi (Black Cab)
Approved vehicle applications
Double Deck Buses
- To be advised
Single Deck Buses
- To be advised
Getting certified
Manufacturers of abatement equipment need to get their equipment accredited by the Energy Saving Trust before it can be added to the list of approved devices available to vehicle and Clean Air Zone (CAZ) scheme operators. This ensures that approved filters meet minimum technical standards and that vehicles fitting these approved emission reduction systems meet the national CAZ emissions standards.
Potential applicants should be aware that emission reduction systems and technologies will be required to demonstrate robust technical performance in order to be eligible for approval and manufacturers are required to operate quality management systems to certified standards, for example, ISO 9001. Please see the scheme documentation below for further details.
Scheme documentation and information
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CVRAS Information document for applications
-
CVRAS Guidance on company audit
-
CVRAS Technical requirements for low emission adaptations
-
CVRAS Test protocols, cycles and emission limits
Contact our experts
Speak with our Transport Certification team via email or call +44 (0)20 7222 0101 for more details.