Refrigerated transportation: how to maintain cargo temperature in transit
One degree decides the fate of the entire shipment. In refrigerated transport, cargo loses quality not because of time, but because of a temperature failure. The carrier's job is not just to turn on the refrigeration unit, but to hold the set temperature throughout the entire route. The ATP Agreement was signed in 1970. Under it, frozen fish is transported at a temperature no higher than -18 °C, and raw milk at no higher than +6 °C (as of 10/2026, UNECE). Here you pay not for kilometers, but for cargo integrity.
Below we break down ATP temperature classes, what goes into the price, how to book, and the documents worth checking before signing a contract.
What refrigerated transport is
💡 In short:
- A reefer holds the set temperature, while a regular van cannot.
- The maximum cargo temperature is set by the ATP standard, not just by the unit's setting.
- Food transport hygiene: 10/2026, according to EUR-Lex.
A reefer is a truck with an insulated body and a refrigeration unit. The unit does not just cool the air; it holds the required range for the entire trip. A regular van or insulated trailer cannot do this: they only slow down warming.
This type of transport is needed where cargo is temperature-sensitive. That includes food, medicines and vaccines, fresh flowers, cosmetics, and some electronics. Each group has its own temperature class and its own set of documents.
If your cargo spoils within hours, standard logistics will not work. You need a carrier with a certified body and in-transit temperature monitoring.
Temperature classes under the ATP standard
The ATP standard sets maximum temperatures for perishable cargo. This is not a suggestion, but a mandatory maximum for the product at any point in the cargo.
Cargo category | Maximum temperature |
|---|---|
Ice cream | -20 °C |
Frozen fish and seafood | -18 °C |
Other frozen products without butter | -12 °C |
Butter | -10 °C |
Raw milk | +6 °C |
Red meat and game | +7 °C |
Poultry and rabbits | +4 °C |
Offal | +3 °C |
Ground meat | +2 °C |
Maximum values for cargo categories (as of 10/2026, UNECE ATP).
It is important to distinguish between product temperature and air temperature inside the body. A sensor in the airflow shows the environment around the cargo, not the cargo itself. That is why the carrier sets the unit with a margin, so as not to freeze chilled goods or thaw frozen ones.
The ATP equipment class, such as FRC or RRC, describes what a specific body is capable of. Choose it based on your cargo, not on the price of the trip.
Refrigerated transport by KKPoland
The Polish company KKPoland operates in this market. According to its service description, it specializes in refrigerated transport and works in two directions: within Poland and across Europe.
According to the company, the price is known in advance. The client receives a price list and a per-kilometer rate before the trip starts, with no surcharges at the end. Transport is handled by trained staff, and the bodies are equipped with refrigeration units with temperature monitoring.
If you need a carrier for a specific temperature class, ask KKPoland about the vehicle's ATP class and the availability of temperature logs.
What goes into the cost
The price of refrigerated transport is not just about distance. The rate is calculated from a set of factors, and each one can noticeably change the final figure.
Factor | How it affects the price |
|---|---|
Distance and route | per-kilometer charge, empty return trip |
Temperature class | the lower the temperature, the higher the fuel consumption |
Cargo type | medicines and meat cost more than vegetables |
Body utilization | partial loads raise the price per unit |
Special requirements | second temperature zone, sensors, insurance |
The carrier gives the exact rate for a specific trip. If you are shown only a per-kilometer price, ask what it includes. Loading fees, waiting time, and the return trip are often charged separately.
How to book: steps
The process is almost the same for a one-off trip and for regular shipments.
- Determine the cargo category and the maximum temperature under ATP.
- Prepare the CMR waybill and the temperature requirements for the shipment.
- Check terms and rates with two or three carriers.
- Verify the ATP class and the validity of the vehicle's certificate.
- Agree on the loading plan, checkpoints, and how temperature will be recorded.
- Put liability for temperature deviations in the contract.
The more precisely you describe the cargo and the temperature class, the fewer disputes there will be on the road. If you are unsure about the equipment class, ask the carrier to confirm it with documents.
Documents and carrier requirements
Perishable transport is documented more strictly than regular delivery. Food products fall under EU hygiene regulation No. 852/2004 and HACCP principles (as of 10/2026, regulation text on EUR-Lex). Here is what you should have in hand before the trip starts.
- ATP certificate for the specific vehicle with the body class.
- CMR waybill for international trips.
- Temperature log or sensor readings for the trip.
- Carrier's cargo liability insurance.
The ATP certificate is tied to the vehicle, not to the company. Check that it is valid and covers the required temperature class. Every number in the log must match the temperature class you ordered.
Common mistakes when booking
Most trip failures are caused not by breakdowns, but by errors in the booking request.
- Booking without an exact cargo category: the word "frozen" hides different temperature classes.
- Confusing air temperature inside the body with product temperature.
- No temperature record: there is nothing to support a claim against the carrier.
- Partial load, which raises the price per unit.
- Expired ATP certificate on the vehicle.
Check documents before loading, not at unloading. That way you still have time to swap the vehicle.
⁉️🤔 Frequently asked questions
How is a reefer different from an insulated van?
A reefer is equipped with a refrigeration unit and actively cools the body to the set temperature. An insulated van has only thermal insulation, with no source of cold. Such a van only slows down warming, so it suits short trips and heat-tolerant cargo. For long routes and perishables, you need a full reefer with temperature control.
What temperature is considered safe for frozen products?
The ATP standard sets the maximum temperature separately for each category. Ice cream requires the lowest temperature, frozen fish and seafood slightly higher, other frozen products higher still. This is the maximum for the product, not the refrigeration unit's setting. The carrier sets the unit with a margin so the cargo does not thaw in transit.
What is an ATP class and why is it needed?
The ATP class describes what a specific body is capable of: what temperature it can hold and at what outside temperature. The certificate is tied to the vehicle and confirms its characteristics after testing. For international trips with perishables, you need a valid document with the appropriate class. Without it, the transport is legally questionable.
Is a temperature log mandatory?
For food products, EU regulation requires temperature monitoring at all stages, including transport. In practice, this means recording readings for the trip. The log protects both sides: the carrier proves compliance with the temperature class, and you get grounds for a claim if the cargo spoils.
Can medicines be transported together with food?
Mixing different categories in one body is risky. Medicines often have their own temperature class and cleanliness requirements, and odors and contamination from food are unacceptable. The ATP class and sanitary rules determine what can be loaded together. If mixed loading is needed, agree on it with the carrier in advance.
How is a one-off trip different from regular shipments?
A one-off trip is charged at the full rate, including the empty return trip. With regular shipments, the carrier gives a discount for loading in both directions and a predictable route. If you have stable volume, discuss a contract for several months. This usually lowers the price per trip.
In short: how to choose a carrier
A good carrier for perishables stands out not by advertising, but by documents. First check for a valid ATP certificate with the required temperature class. Then ask how temperature is recorded during the trip and what the contract says about liability. Compare terms from two or three companies: the difference in per-kilometer price is usually explained not by greed, but by different rules on waiting time and the return trip.
Before paying, check the contract terms and the equipment class against your cargo. That is the only thing that actually protects your shipment and your budget.
A small editorial team writing guides for independent travel. We travel ourselves, but we haven’t been everywhere, so we check prices, opening hours and how to get there against official sources.