Verified Retrofits for In-Use Off-Road Diesel Vehicles
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Due to CARBs Off-Road Regulation changes approved in 2011, exhaust retrofits1 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. Please see the Installers and Contacts list for contact information. For additional information for potentially verified retrofit devices, please use the VDECS Database. For additional information regarding Cleaire fitlers, please see the Cleaire Customer Resources page.
Three Steps to Getting Started
- Find out which VDECS may be verified for your vehicle's engine(s).
- Contact an installer or manufacturer.
- Find out which VDECS is most appropriate for your vehicle.
| 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. 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:
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- 1Section 2449(e)(8) VDECS That Impairs Safe Operation of Vehicle - A fleet owner may request that the Executive Officer find that a VDECS shall not be considered the highest level VDECS available because (A) it cannot be safely installed or operated in a particular vehicle application, or (B) its use would make compliance with federal or state requirements for safety or health, or an ongoing local air district permit condition, such as for use of a diesel oxidation catalyst, technologically infeasible. If a VDECS manufacturer states that there is no safe or appropriate method of mounting its VDECS on the requesting party's vehicle, then the VDECS will not be considered safe.