FRANKLIN, Mass. /Massachusetts Newswire/ -- RYPOS, Inc., a developer and manufacturer of advanced, exhaust filtration systems that reduce harmful emissions from diesel engines is pleased to announce the successful completion of the On-Road In-Use Compliance required by the California Air Resources Board for their entire Ultra Low Emission Transportation Refrigeration Unit active diesel particulate filter (DPF) product line. The post Rypos ULETRU Filters for 2021 Achieve In-Use Compliance Goals for Leading Transportation Refrigeration Units appeared first on Massachusetts Newswire.