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· Direct-Fired Heaters (DFH)2 and similar equipment to reduce idling
· Auxiliary Power Units (APU)2
· Diesel Hybrid Vehicles
· Engine Repowers (depending on funding availability)
· Other types of technologies that may not be listed above or are combinations of
equipment (e.g., DOC & CCV) and are on the Verified Technologies List or the Idle
Reduction Technologies List where the equipment is appropriate for the vehicle
application and utilization.
1Vehicles selected for Diesel Particulate Filters should not have an Exhaust Gas Recirculation (EGR)
engine, as these are often incompatible with DPFs. Please coordinate with your equipment vendor or
the manufacturer’s representatives in assessing whether DPFs are compatible for your type of vehicle,
engine, and vehicle utilization.
2The California Air Resources Board (CARB) has more stringent emission requirements for APUs. If
your grant application involves the purchase of an APU for affected trucks or buses that operate in the
State of California at any time, the APU must be certified by CARB to meet its current regulations.
Please click on the “APU Certification Requirements for Trucks Driving in California” link at
www.illinoisgreenfleets.org for more information.
Idling equipment, such as direct-fired heaters (DFH), auxiliary power units (APU), battery air
conditioning systems (BAC) and similar products, would be appropriate for vehicles that tend to
have the main engine running to operate electrical systems, auxiliary equipment, to keep the
engine and fluids warm during cold weather, and to heat or cool the cabin for the driver or
passengers. The types of vehicles and their utilization appropriate for idling equipment include:
· Trucks in which the drivers must keep the engines operating to keep cargo at a certain
temperature (e.g., refrigerated truck)
· Long haul trucks in which the drivers are required, by federal law, to take a mandatory
10-hour rest period each day. Many long haul drivers keep the main engine running to
power air conditioning, heat, televisions, microwaves, and other electronic items in the
cab while resting. In addition, idling equipment on a truck benefits both the driver and
the public at rest stops, truck stops, loading docks, businesses or near residential areas
where the driver may need to run the engine while the vehicle is parked.
· School buses that are parked outdoors while not in use and where it is often necessary to
leave the engines idle for significant amounts of time in order to keep the engine, fluids,
and cabin up to temperature to alleviate cold weather operational concerns
Diesel Hybrid Vehicles are appropriate for the following types of applications:
· Vehicles that do a lot of city driving in “stop and go traffic” where hybrid technology will
improve fuel efficiency and reduce emissions.
· Buses, including mass transit, school, commercial, and shuttle buses, that drive in urban
areas and normally idle while loading or unloading passengers to keep the vehicle cabin
comfortable, are in use for many hours during the day, and have a lot of daily “standing
time” in waiting for passengers to board.
