Temperature controlled air freight moves cargo that has to stay within a defined temperature range from origin to destination, using either powered containers that regulate their own internal temperature or insulated packaging that holds a range for a fixed number of hours. Pharmaceuticals, vaccines, biological samples, perishables and some chemicals all travel this way.
The governing standard is the IATA Temperature Control Regulations, usually shortened to TCR. Alongside it sits CEIV Pharma, IATA’s certification programme for airlines, forwarders and ground handlers moving healthcare products.
What makes temperature controlled air freight difficult is not the flight. It is every point on the ground where a shipment waits.
What Is Temperature Controlled Air Freight?
Temperature controlled air freight is the carriage of goods that must remain inside a specified temperature band throughout the journey, including handling, storage, ramp transfer and flight. A shipment that leaves the band, even briefly, has suffered what the industry calls a temperature excursion.
An excursion is not a delay or a damage claim in the ordinary sense. For a pharmaceutical consignment it can mean the product is no longer fit for use, regardless of whether it arrived on time and physically intact.
That is why this is treated as a distinct discipline rather than as general cargo with a cold box attached.
What Are the Standard Temperature Ranges?
Temperature controlled cargo is grouped into standard bands, and the band determines which container type and which handling regime applies.
| Range | Common name | Typical cargo |
|---|---|---|
| +15°C to +25°C | Controlled room temperature, CRT | Tablets, many finished pharmaceuticals, some diagnostics |
| +2°C to +8°C | Cold chain, chilled | Vaccines, biologics, insulin, blood products |
| Frozen, below 0°C | Frozen | Some biological materials, certain food products |
| Deep frozen and cryogenic, well below 0°C | Deep frozen | Cell and gene therapies, certain research materials |
| Ambient with protection | Perishables | Fresh produce, flowers, seafood, live seafood |
The narrower the band and the lower the temperature, the fewer the carriers, handlers and containers that can serve it. Deep frozen and cryogenic shipments in particular need specialist active equipment rather than standard passive packaging.
Active, Passive or Hybrid, and How to Choose
The three container types differ in how they hold temperature, and the choice is a trade-off between duration, control and cost.
| Active | Passive | Hybrid | |
|---|---|---|---|
| How it holds temperature | Own power source, with compressor cooling and electric heating | Insulation with gel packs, phase change materials or dry ice | Combines insulation with a rechargeable or assisted cooling element |
| Duration | Maintained as long as power and fuel allow, and can be recharged | A fixed window, commonly 24, 72 or 96 hours | Extended window, typically longer than passive alone |
| Control | Holds a set temperature regardless of external conditions | Holds a range, with the clock running from the moment it is packed | Between the two |
| Cost | Highest | Lowest | Middle |
| Best suited to | Long or multi-leg journeys, narrow bands, deep frozen, high-value consignments | Short direct routings, wider bands, predictable handling | Long journeys where full active capability is not justified |
Choose active when the routing involves transfers, the temperature band is narrow, the value of the consignment justifies the cost, or the total journey time is uncertain.
Choose passive when the routing is direct and reliable, the band is wider, and the total time from packing to delivery sits comfortably inside the container’s rated window.
The most common mistake is treating the rated window as the flight time. The clock starts when the container is packed, not when the aircraft departs, and it keeps running through every hour of ground handling, customs and delivery at the other end.
Advanced Passive Units
Some passive containers are now certified as aircraft units in their own right, approved by the FAA and EASA, which allows them to be loaded directly to the aircraft rather than being built onto a separate ULD. Others achieve very low temperatures without dry ice, which removes a dangerous goods complication from the shipment.
Where Do Temperature Excursions Actually Happen?
Excursions concentrate on the ground rather than in the air, because the aircraft hold is a controlled environment and the apron, the transfer and the warehouse frequently are not.
The recurring failure points are:
- Tarmac and apron dwell, where a unit waits in ambient conditions while other cargo is cleared
- Transfer at a hub, where a shipment changes aircraft and sits between two controlled environments
- Customs and regulatory holds, which are unpredictable and can run far longer than planned
- Acceptance and build-up, where a unit is opened, rebuilt or waits in a non-temperature-controlled area
- First and last mile, where road transport and warehousing may not match the standard applied in the air
This is the practical argument for booking through facilities with dedicated temperature controlled infrastructure, including powered positions for active units, temperature controlled storage and priority ramp handling.
What Governs Temperature Controlled Air Freight?
Two frameworks apply, and they do different things.
IATA Temperature Control Regulations, the TCR. This is the operational standard for handling time and temperature sensitive cargo by air, covering packaging, handling, labelling and documentation. It is the temperature equivalent of what the Live Animals Regulations are for animal transport.
CEIV Pharma. This is IATA’s certification programme, formally the Center of Excellence for Independent Validators in Pharmaceutical Logistics. It audits airlines, forwarders and ground handlers against a common set of pharmaceutical handling standards covering quality management, trained personnel, calibrated equipment and alignment with Good Distribution Practice. Validation is carried out against both IATA TCR and United States Pharmacopeia requirements.
Good Distribution Practice, or GDP, sits underneath both. It is the regulatory framework for the distribution of medicinal products, and it is what the pharmaceutical shipper is ultimately accountable to.
What Does CEIV Certification Actually Guarantee?
CEIV certification confirms that a facility or operator has been audited against a common standard, with trained staff, calibrated equipment and documented processes. It does not guarantee that an individual shipment will avoid an excursion.
The distinction matters when selecting a routing. A CEIV certified origin station does not help if the transfer hub or the destination handler is not equally equipped. Cool chain integrity is set by the weakest link in the chain, not by the strongest.
How Is Temperature Controlled Air Freight Priced?
Temperature controlled shipments cost more than general cargo because of the container, the handling and the monitoring, and active units cost considerably more than passive ones.
Four things drive the cost.
- Container type and rental, with active units carrying a daily rental and a repositioning cost
- Chargeable weight, since temperature controlled units are heavy and bulky relative to their payload. How this is calculated is covered in the guide to chargeable weight in air freight
- Handling and storage, including powered positions, temperature controlled warehousing and priority ramp treatment
- Monitoring, including data loggers, real-time tracking and the reporting that GDP compliance requires
An active container’s rental clock runs on the same basis as its temperature clock, from collection to return, which means a delayed return on a one-way lane adds cost after the shipment has been delivered.
Questions About Temperature Controlled Air Freight
What is the difference between active and passive temperature controlled containers?
An active container has its own power source and maintains a set temperature regardless of external conditions. A passive container relies on insulation and coolant such as gel packs, phase change materials or dry ice, and holds its range for a fixed number of hours before the temperature begins to drift.
What is a temperature excursion?
A temperature excursion is any period during which a shipment falls outside its specified temperature range. For pharmaceutical cargo an excursion can render the product unusable even if the shipment is otherwise undamaged and on time.
What is an RKN container?
An RKN is an active temperature controlled container, capable of both heating and cooling to hold a payload within a set range. It is one of the most widely used active units in pharmaceutical air freight.
What is IATA CEIV Pharma?
CEIV Pharma is IATA’s certification programme for pharmaceutical air logistics. It audits airlines, freight forwarders and ground handlers against common standards covering quality management, trained personnel, calibrated equipment and alignment with Good Distribution Practice.
What temperature range is the pharmaceutical cold chain?
The most commonly referenced pharmaceutical cold chain range is +2°C to +8°C. Controlled room temperature cargo travels at +15°C to +25°C, and some cell and gene therapies require deep frozen or cryogenic conditions well below zero.
How long does a passive container hold temperature?
Passive containers are rated for a fixed window, commonly 24, 72 or 96 hours, depending on the unit and the payload. The window starts at the moment of packing, not at departure, so ground time at both ends has to be counted inside it.
Does dry ice count as dangerous goods?
Dry ice is classified as a dangerous good in air transport and carries its own packing, labelling and documentation requirements. Some passive systems are designed to reach low temperatures without it, which removes that complication from the shipment.
