Reefer
A refrigerated trailer for temperature-controlled freight where temperature, run instructions, washout, fuel, seals, and timing need written confirmation.
Written and reviewed by LaneMath Editorial Team, with carrier workflow review from Dale Morrow where practical dispatch, paperwork, or lane-planning context is involved. Updated 2026-06-04. LaneMath pages use public references, example-only math, and conservative editorial review.
Carrier note
Use this term in context with the rate confirmation, broker communication, facility instructions, and billing paperwork. A short definition is useful, but the written load terms control the actual freight decision.
Carrier example
A carrier checks reefer requirements before booking because equipment details can change time, cost, and risk.
Common mistake
Assuming reefer requirements are standard without asking about the actual shipment.
Paperwork note
For reefer, keep the written instruction or dispatch note close to the rate confirmation so the term has load-specific context.
Temperature compliance as a carrier responsibility
Reefer carriers are responsible for maintaining the temperature set point from pickup to delivery according to shipper instructions. That means confirming the set point before loading, monitoring the unit during transit, documenting temperature excursions if any occur, and having delivery records that show what the unit maintained.
A temperature rejection at delivery creates a cargo claim situation even when the carrier operated the unit correctly. Keeping a pre-cool record, a continuous temperature download, and a delivery note documenting seal condition and receiver signature protects the carrier when a dispute arises.
Reefer versus dry van for the same lane
A reefer carrier evaluating a lane against a dry van equivalent should account for the temperature compliance requirements, reefer fuel cost during transit, pre-cool time at the shipper, and receiver rejection risk. Those factors add time, cost, and compliance exposure that a dry van move on the same lane does not carry.
Whether the reefer premium in the rate is sufficient to cover those added costs depends on the load specifics. A short reefer move with strict temperature requirements and a challenging receiver may not produce better economics than a longer dry van run on a simpler lane.
Questions to ask in context
- What is the temperature set point and run mode required by the shipper?
- Is reefer fuel included in the rate, or is it an out-of-pocket cost during extended dwell?
- What documentation does the receiver require at delivery for temperature compliance?
References and methodology
- Industry terminology and editorial explanation - LaneMath Editorial Desk. Used here for: Plain-English definitions, checklists, and example-only calculations.Editorial explanations are not official guidance, legal advice, or market data. Last checked 2026-06-29.