Verified Retrofits for Off-Road Diesel
This page last reviewed October 21, 2013
Off-Road Diesel Vehicle
Regulation and Verified Diesel Emissions Control Strategies (VDECS)
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Currently Verified Devices
3 Steps to Getting Started
|VDECS are exhaust retrofits, the most common types of
which are diesel particulate filters (DPF).
VDECS have been evaluated and verified
by the Air Resources Board (ARB) to lower the harmful emissions from
Owners of off-road diesel vehicles may elect to install
ARB-verified exhaust retrofits on their vehicles to comply with the in-use off-road
diesel vehicle regulation. Only retrofits that
verified by ARB to reduce emissions, meet durability standards, and
come with a manufacturer's warranty will provide credit towards the
off-road diesel vehicle regulation.
to ARB off-road regulation changes approved in 2011, exhaust retrofits
are no longer mandatory. Fleets have the option to install
exhaust retrofits as part of their overall strategy to meet
performance requirements. Exhaust retrofits provide an emissions
reduction benefit which will assist a fleet in meeting fleet average
targets. In addition, installing exhaust retrofits can provide Best
Available Control Technology (BACT) credit to a fleet, as well as other
benefits, such as exempting a vehicle from future turnover requirements.
Installation & Maintenance-
VDECS installation and maintenance, and related advisories
For each verified Level 3 device for off-road vehicles (Level 3 means
they reduce Particulate Matter (PM) by
at least 85 percent), the table below links to the verification page
which details more information about the types of engines for which the
device is approved for use. For more information about each device,
click on the device name link below. For contact information check the Installers and
Currently Verified Devices
for Off-Road Diesel Vehicles
products have not been available for sale or lease since it ceased
operations on January 18, 2013. ESW CleanTech Incorporated (ESW
CleanTech) acquired the Cleaire product line on April 18, 2013, and
will provide new sales of product under its ownership as well as
support for existing Cleaire customers. Vehicles that have the
Cleaire devices already installed in a verified configuration will
continue to meet applicable in-use fleet rule requirements. Please
refer to the following website for additional information: Cleaire Information Page.***
- Find out which VDECS may be verfied for your
- Contact an installer or manufacturer.
- Find out which VDECS is most appropriate for
1. Find out which VDECS may be verified for your vehicle's engine(s).
Only Level 2 (reduces PM by at least 50
percent) or Level 3 VDECS that
have been verified by ARB for your engine and application will provide
credit toward the off-road reguation (except in limited situations for
experimental devices). Once you decide that VDECS may be a compliance
option you wish to pursue, the first step is to determine which VDECS
are verified for your off-road engines. You may examine the
applicability in the table above to see which devices may be
appropriate. Alternatively, the VDECS
database allows fleets to search for verified devices by
entering the engine family name, or by listing the engine model year,
manufacturer, and displacement.
2. Contact an installer or manufacturer.
After reviewing the available VDECS, the
next step is contacting
the appropriate manufacturer(s) to get a list of installers, or
contacting an installation facility from our online list.
The installers may need to data log your engine, perform an inspection
to see if mounting the device is feasible, and discuss additional
options with you. In some cases, even though the device is verified for
your engine, the installer will not be
able to perform the installation (due to exhaust temperature, vehicle
structure, or safety concerns).
3. Find out which VDECS is most appropriate
for your vehicle.
There are a number of considerations fleets
should account for when choosing an exhaust retrofit. When there are
multiple devices verified for an engine, fleets should consider:
- Which is the highest level device.
- Can the device be safely installed? (View our
page on VDECS
- Are the retrofit's regeneration requirements
appropriate given the vehicle use.
- Additional impacts on vehicle operation.
to the homepage for the off-road diesel vehicle regulation.