Active DPF/ULETRU™ for Carrier and ThermoKing MY2003 or Newer TRUs

California Air Resources Board (CARB) Level 3 Plus verified for use on Carrier and ThermoKing Transportation Refrigeration Units (TRU) using 2003 and newer model year engines, the Rypos Active DPF/ULETRU™ diesel particulate filter reduces particulate matter by 85%+ in TRU applications. The RYPOS Active DPF/ULETRU can be used to comply with CARB’s Ultra-Low-Emission TRU (ULETRU) In-Use Performance Standard.


The RYPOS Active DPF/ULETRU system was developed to meet the emerging state and federal regulations for TRU diesel emissions. It provides TRU owners with the lowest total cost for CARB TRU ATCM compliance.  The active, electronically regenerating diesel exhaust filter system is a modular design that replaces the muffler and operates online without engine shutdown. Minimal maintenance is required. The Rypos Active DPF/ULETRU system mounts easily within the TRU frame and requires only 12 volts dc power. The system is warrantied for four years or 2,600 hours. Information on specific conditions of the CARB approval is available on CARB’s Verification Procedure – Level 3 webpage.

To watch a short video on how Rypos Active DPF Regeneration Technology works click here.

To view the Rypos Active DPF/ULETRU brochure  click here.

For additional contact information click here.