Innovating The Future of Clean Air


On The Road To Clean Air

Don't Wait Until It's Too Late

California Air Resource Board Transport Refrigeration Units regulations apply to owners and operators of diesel-fueled and TRU generator sets installed on trucks, trailers, shipping containers, or railcars that operate in the state of California (including out-of-state vehicles).


Rypos is the leading technology provider for TRU Operators.

We are innovating the future of clean air through intelligent emissions reduction built on the company’s patented electrically self-regenerating filters. With over 13,000 DPF’s sold, the Rypos DPF ULETRU has been engineered to work seamlessly with both Thermo King® and Carrier® refrigeration units without the need for any operator interaction. Rypos should be the 1st choice for any TRU operator or fleet entering California where they must comply with the CARB TRU ATCM.

The RYPOS DPF/ULETRU is a highly effective self-cleaning diesel exhaust filter that uses an electrically conductive sintered metal fiber medium and electrical power from the TRU to regenerate the filter when needed.

Rypos DPF ULETRU Benefits

CARB Level 3+ Verified

Meets final Tier 4 Emissions Requirements for CARB

Active, Electrically Regenerated

Modular Design

Minimal Maintenance Required

Replaces Muffler

Over 85% PM Reduction Achieved in TRU Application

4 Years or 2,600 Hours Warranty

Thermo King DPF ULETRU

Rypos DPF ULETRU is the right choice

Up to 60%  Savings Over The Cost of Engine Re-Power

Fast Installation - Conveniently mounts within the TRU frame - Installs in approximately 4 hours

Low-Cost Trial Program Available for Fleets

Filter May Be Moved From Unit to Unit Within Fleet, Allowing Flexibility For Retiring Or Selling Older Units

Nationwide Dealer Network - Over 30 Dealers in CA, Including Select Thermo King and Carrier Transicold Locations

Operates Online. No Need for Engine Shutdown

Self -Cleaning, Independent of Exhaust Temperatures

Rugged, Stainless Steel Housing - 80lbs

Approximate dimensions: Carrier kit; 40” L x 7” diameter, Thermo King kit; 26” L x 13” W x 8” H



Valuable Information on Rypos TRU Product Line

Read or Download Product Information, Installation Manuals, CARB Executive Orders, and other valuable resources.



Our TRU Experts Are Here to Help

Rypos' sales team are leaders in the transportation industry and can work with you to ensure you are in compliance with emissions regulations and utilizing best of breed technologies for your application.

Debbie Gorman-Dill

Inside Sales Representative

Tel: (508) 429-4553


Rypos Inc. DPF

(508) 429-4552

40 Kenwood Circle, Franklin, MA 02038

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