CARB Regulations for Transport Refrigeration Units (TRU)

Regulatory Amendments for TRUs


As environmental regulations tighten, businesses involved in transporting refrigerated goods within California must stay updated on the latest CARB regulations. These updates specifically target Transport Refrigeration Units (TRUs), with an aim to enhance air quality and align with broader ecological goals.

Lower GWP Refrigerants

From December 31, 2022, all new TRUs must use refrigerants with a Global Warming Potential (GWP) of 2,200 or less, or operate without refrigerants to meet updated standards.

Stringent PM Emission Standards:

Effective from December 31, 2022, new TRUs from the 2023 model year onward must meet a PM emission standard of 0.02 grams per brake horsepower-hour, aligning with EPA Tier 4 final standards.

Owner and Operator Compliance:

TRU owners are required to register with CARB, secure a CARB IDN, and ensure their units are compliant, preparing for regular inspections.

Facility Compliance Obligations:

By December 31, 2023, facilities like refrigerated warehouses and grocery stores must meet new registration and reporting requirements.

Expanded TRU Reporting Requirements:

All TRU operators must report their units to CARB by the end of 2023, including those based out-of-state.

New Fees and Labeling Requirements:

Starting at the end of 2023, TRU operators will face new operating fees and must update compliance labels every three years.

Transition to Zero-Emission Technologies:

By 2029, fleets must annually transition 15% of their truck TRUs to zero-emission technologies, aiming for full transition by the deadline.

Zero-Emissions TRU Support

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Compliance Extensions

Extensions of up to six months may be granted for delays related to financing, manufacturing, or installation. 

Delegation of Compliance Responsibilities

TRU lessors can delegate compliance responsibilities to lessees in long-term agreements.

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Projected Outcomes

The amendments are expected to significantly reduce PM2.5 and NOx emissions by 2034, with anticipated health savings of about $1.75 billion. These regulations support California’s climate goals and aim to improve public health, particularly in areas heavily impacted by TRU emissions.

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Importance of Compliance

Understanding and adhering to these regulations is important for businesses transporting refrigerated goods in California. Staying informed and proactive not only helps avoid penalties but also contributes positively to environmental sustainability.

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