Controlling CO, HC, PM traditionally required a combination of a DOC and a CDPF, two devices that together yielded sufficient emissions and soot reduction on diesel engines. These systems often require paper filters and expensive controls for the combustion processes utilized for maximizing the emissions reductions. Now, AirFlow Catalyst Systems is reinventing emissions control with technology that eliminates the need for separate systems and delivers a single system to maximize emissions control without paper filters, in less space, and without expensive control equipment. Low temperature efficiency and less maintenenace / downtime are other significant benefits.