The orders were received from Emissions Retrofit Group under the California Air Resources Board’s Lower-Emission School Bus Program.

Shipments and revenue recognition began in the third quarter and are expected to be completed in the fourth quarter of this year.

Clean Diesel Technologies primarily supplies Purifilter Plus diesel particulate filter emissions reduction systems, that employ both passive and active regeneration and is verified by the Environmental Protection Agency and California Air Resources Board.

The Purifilter Plus reduces diesel particulate matter by nearly 85% and is ideally suited for the retrofit of school buses providing a simple plug-in regeneration that can be executed mid-day, resulting in minimal interruption to a typical school bus schedule.

Emissions Retrofit Group president Peter Tuckerman said the company expects the Purifilter Plus system has been an ideal solution for the retrofit of school bus fleets.

Clean Diesel Technologies vice president and general manager Lyndon Smith said Purifilter Plus is a critical member of the Purifilter family of products, aimed at satisfying the ongoing regulatory demands for emissions reduction.

Emissions Retrofit Group is a distributor of Clean Diesel Technologies’ ECS-branded emission reduction products.