What Is a Reefer Truck?
A reefer truck is a commercial vehicle specifically built to transport temperature-sensitive cargo. It combines an insulated cargo body with a mechanical refrigeration system to control the internal climate.
Depending on the cooling unit's capacity and the insulation thickness, these vehicles can maintain a wide range of controlled environments. This typically ranges from deep freeze conditions (around -18°C to -25°C) to chilled environments (+2°C to +8°C). The exact temperature control depends on the cargo requirements and the specific equipment installed.
Reefer Truck vs Dry Van
For fleet managers expanding their logistics operations, understanding the difference between a reefer truck and a standard dry van is the first step. While both are enclosed box trucks, their structures and operational costs are very different.
| Feature | Reefer Truck | Dry Van |
|---|---|---|
| Primary Use | Temperature‑sensitive goods (food, medical) | General cargo, electronics, furniture |
| Cargo Body | Insulated with high‑density polyurethane foam | Uninsulated steel, aluminum, or plywood |
| Temperature Control | Active mechanical cooling unit | Ambient temperature only |
| Vehicle Weight | Heavier (due to insulation and cooling unit) | Lighter |
| Initial Cost | Higher | Lower |
Because the insulated box and cooling machinery add significant weight, a reefer truck will always have a lower available payload capacity than a dry van built on the exact same chassis.
Understanding Refrigeration Units
The cooling unit is the most critical component of a refrigerated vehicle. Selecting the right technology directly impacts fuel consumption, maintenance costs, and delivery routing.
Direct-Drive Units
These units are powered by the truck's main engine via a belt-driven compressor.- Advantage: Lighter, more affordable, and easier to maintain.
- Limitation: Cooling stops when the truck engine is turned off.
- Best For: Urban delivery and light commercial vehicles making short trips.
Independent Units
These systems have their own dedicated diesel engine to power the compressor.- Advantage: Provides continuous cooling even when the truck is parked and the main engine is off.
- Limitation: Heavier, more expensive, and requires separate diesel maintenance.
- Best For: Heavy-duty trucks, cross-border logistics, and long-haul transport.
Electric Standby Systems
Many modern units include an electric standby option. This allows the driver to plug the cooling unit into an electrical grid when parked at a warehouse. It saves diesel fuel, reduces emissions, and eliminates engine noise during overnight storage.Multi-Temperature Systems
For logistics companies carrying mixed loads, multi-temperature units use multiple evaporators. Combined with movable insulated partition walls inside the box, this allows one truck to carry frozen meat in the front section and chilled vegetables in the rear.Reefer Truck Specifications Buyers Must Check
When evaluating a reefer truck, fleet managers must look beyond basic dimensions. The following technical specifications determine if the vehicle is suitable for a specific cold chain route.
Gross Vehicle Weight (GVW) and True Payload
GVW is the maximum legal weight of the fully loaded truck. Buyers must calculate the true payload by taking the GVW and subtracting the chassis weight, the heavy insulated box, and the cooling unit.Insulation Thickness and Material
The thermal efficiency of the cargo body depends on the insulation. Most manufacturers use polyurethane (PU) foam.- 60mm to 80mm: Suitable for chilled goods (produce, dairy).
-
80mm to 100mm: Required for frozen goods (meat, seafood).
The exterior and interior skins should be Fiberglass Reinforced Plastic (FRP) or food-grade stainless steel to prevent corrosion and support easy cleaning.
Cooling Capacity
Cooling capacity is measured in Watts (W) at specific ambient and internal temperatures. Buyers must ensure the unit's cooling capacity is high enough to offset the heat that enters the box when the rear doors are frequently opened during deliveries.Main Types of Reefer Trucks
Reefer trucks are categorized by their structural size and transport volume.
Van-Based Reefers
These are standard commercial cargo vans modified with internal insulation and small direct-drive coolers. They are highly maneuverable and primarily used for small-batch pharmaceutical deliveries or local catering supplies.Light and Medium Box Trucks
Built on standard 4x2 chassis, these are the most common vehicles in regional cold chain logistics. They transport pallets of fresh or frozen goods from major distribution centers to local supermarkets.Heavy-Duty Rigid Trucks
Built on larger 6x4 or 8x4 chassis, these trucks handle long-distance transport. They feature thick insulation, independent cooling units, and high cargo volume. They are designed for intercity routes where temperature stability over several days is required.
Key Applications in Cold Chain Logistics
Refrigerated vehicles serve multiple industries. The internal configuration must match the application.
Frozen Food Transportation
Transporting frozen seafood and ice cream requires extreme cold. These trucks often feature corrugated or T-shaped aluminum floors. The raised grooves allow cold air to circulate beneath the cargo, preventing the bottom boxes from absorbing road heat and thawing.Fresh Produce and Dairy
Fresh vegetables and milk need a strictly chilled, not frozen, environment. Flat fiberglass floors are usually sufficient, but the cooling unit must have precise temperature and humidity control to prevent frost damage to the fresh produce.Floral and Chemical Transport
Cut flowers require very specific temperature and humidity levels to prevent wilting. Similarly, certain industrial chemicals and resins must be kept at stable temperatures to prevent dangerous chemical reactions or product degradation during transit.Medical and Pharmaceutical Logistics
Vaccines and liquid medicines demand unbroken cold chains. Medical reefer trucks are equipped with advanced temperature data loggers, GPS monitoring, and backup cooling systems to guarantee compliance with health regulations.Sourcing a Reefer Truck in China
For international fleet buyers and distributors, sourcing a reefer truck in China offers significant advantages. China's commercial vehicle industry provides access to flexible manufacturing, competitive pricing, and advanced cold chain technology.
However, importing special vehicles requires a strategic procurement approach to ensure the final product meets local operational and legal standards.
CBU vs CKD Sourcing
Buyers can choose how they import the vehicle:- CBU (Completely Built Unit): The entire truck, including the chassis and refrigerated box, is manufactured in China and shipped ready to use. This requires the Chinese chassis brand to meet the emission and steering (LHD/RHD) regulations of the destination country.
- CKD (Completely Knocked Down) / Body-Only: Buyers source the insulated cargo box and cooling unit from China, and then mount them onto a locally purchased chassis (such as Isuzu, Hino, or Volvo) in their home country. This is a highly popular option to avoid chassis homologation issues.
Choosing the Right Components
When customizing a vehicle, buyers should specify internationally recognized cooling unit brands. This ensures that maintenance and spare parts are easily available in the destination country.
How CNSpecialVehicle Supports Your Procurement
Evaluating factory capabilities, managing quality inspections, and handling export documents can be complex. CNSpecialVehicle serves as a professional B2B platform to streamline this process. Buyers can explore different food transport trucks to compare payload classes, insulation materials, and body designs.
Whether you need a complete vehicle or custom insulated boxes for your local assembly line, you can contact us directly. We help connect international buyers with verified suppliers, ensuring you receive accurate technical specifications and reliable export support.
Reference Sources
ATP Agreement (Agreement on the International Carriage of Perishable Foodstuffs)ISO 1496-2: Series 1 freight containers — Specification and testing — Part 2: Thermal containers
World Health Organization (WHO) - Guidelines on the international packaging and shipping of vaccines
