Single-Temperature Refrigeration Units

A complete line of single-temperature units for long haul and delivery applications.


The Precedent S-600 single-temp reefer delivers double-digit fuel savings and Thermo King...


For single-temperature trailers requiring deep-frozen capability, choose the Precedent S-700...


Enjoy the benefits of Precedent in a cost-effective package with the C-600 single-temp reefer. The...

Photo of trailer with Precedent unit.

The Precedent S-Series: The Only Evergreen Choice

Developed to achieve Evergreen CARB and EPA emissions compliance while adding performance, the Precedent S-Series is notable for what it does not have: a Diesel Particulate Filter (DPF). When considering the negative impact on engine life and fuel efficiency that a DPF brings, it was clear that a DPF was not a viable solution for units that run in California. Choose the S-Series and you’ll avoid the unknowns and risks of DPFs and can rest easy knowing that you’re running the only unit available that will be compliant nationwide for as long as you own it.

Photo of Precedent unit with service doors open.

Diesel Direct Electric Architecture

The Precedent platform utilizes our unique DDE (Diesel Direct Electric) architecture to drive optimum efficiencies and double-digit fuel savings across real-world applications. It’s a smarter approach, with the expressed goal of making a lasting difference on your budget. Precedent utilizes DDE architecture to drive optimum efficiencies and double-digit fuel savings and ensures minimal energy loss and maximized fuel efficiency and reliability when compared to other solutions.

Graph showing  tighter temperature control

Precision Temperature Control

“Close enough” isn’t what your customers are looking for with their temperature-sensitive cargo. Your unit should perform as you program it to, which is just what Precedent units do. No magic, no averaging, just precise temperature control that helps ensure your loads arrive exactly as they should.

Photo of a trailer with a Precedent unit


Thermo King’s entire line of Precedent refrigeration units offer patent-pending Eco-Pulldown technology that can dramatically reduce fuel consumption. Eco-Pulldown technology takes advantage of the efficient design of the Precedent refrigeration system.

Stylized photo of a skyline with graphic digital imagery overlaid across the photo.

Connected Solutions

Every Precedent trailer refrigeration unit comes Connected from the factory powered by TracKing, making it easier for fleets to monitor and analyze their refrigerated fleet operations. Fleets can save time and money on installation and choose to enable TracKing remotely, gain access to data, and focus on their business without having to take their assets off the road. Also, fleets can access data for temperature traceability and FSMA compliance while gaining insights into the performance of their refrigeration units.