NO SMOKE 2 is designed for any 2007/2010 or newer vehicle with an After Treatment Device

The NO SMOKE 2 diesel filtration system differs from the NO SMOKE as it does not require the diverter box technology. The system is constantly filtering harmful exhaust from the environment inside the fire station at cold starts, and while low idling on scene.

The NO SMOKE 2 system is installed in the tailpipe before the tip and well after the ATD. We do not touch anything with the ATD or the diffuser tip so that we do not void the manufacturer’s warranty.

The filter is constructed of a flow thru substrate with platinum, palladium and other compounds that allow the system to regenerate when the manufacturers’ ATD regenerates. Virtually alleviating the need to change the filter. 


The system provides protection when it is needed most, during periods of low temperature exhaust – cold starts, low idle and on-scene use. It is at these times the manufacturers’ ATD is not actively oxidizing emissions. It takes 40 to 60 minutes for the vehicle to come to temperature before allowing the ATD to begin oxidization. The NO SMOKE 2 is always on and protecting. 

NO SMOKE 2 – Dealer Installation Video

Ward Diesel Filter Systems is proud to partner with all Builders and Dealers across the United States. Our Technicians travel to each location to install the NO SMOKE Filter System as called out in the new build specifications. In this video Jerry Harley from Williams
Fire Apparatus discusses an install for Gwinnett County Fire.

With thousands of installations currently operating,

NO SMOKE has proven its capability and reliability to fire and rescue personnel throughout the world. We hope that you will be next to join the growing list of fire departments that have decided to protect their personnel with NO SMOKE.