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What Is a Reefer Container? Temperature-Controlled Shipping

A reefer container (short for refrigerated container) is a temperature-controlled shipping container designed to transport perishable or sensitive goods across long distances—by ocean, rail, or truck. These containers are equipped with built-in refrigeration units to maintain specific temperatures ranging from -30°C to +30°C (-22°F to +86°F) depending on the cargo requirements.

Used in cold chain logistics, reefer containers are essential for shippers handling food, pharmaceuticals, chemicals, flowers, and biotech materials that require strict temperature control throughout transit.

How Do Reefer Containers Work?

Reefer containers use an integrated cooling system powered by the ship’s energy source (when at sea) or a plug-in terminal or genset (when on land). Unlike a typical dry container, a reefer constantly circulates chilled air to preserve product integrity from origin to destination.

They come in standard container sizes—typically 20-foot and 40-foot high cube—and may offer advanced features like:

  • Temperature and humidity monitoring
  • Controlled Atmosphere (CA) technology to slow produce ripening
  • Fresh air exchange settings for sensitive agricultural cargo
  • Real-time GPS and data logging for visibility and compliance

Reefers can transport frozen, chilled, or ambient cargo across continents, often as part of a multimodal cold chain solution.

Key Benefits of Reefer Shipping

  • Precise temperature control throughout long-haul routes
  • Real-time cargo monitoring to ensure compliance and visibility
  • Extended shelf life for perishable products
  • Protection from external climate shocks during transit
  • Reduced product loss or spoilage—saving time and money
  • Compliance with FDA, USDA, and international regulations

Common Uses for Reefer Containers

Reefer containers are vital across multiple industries that depend on temperature-sensitive cargo integrity:

  • Food & Beverage – Frozen meat, seafood, dairy, fruits, vegetables, and beverages
  • Pharmaceuticals & Healthcare – Vaccines, biologics, clinical samples, and temperature-sensitive drugs
  • Floral & Agricultural – Cut flowers, plants, and seeds
  • Chemical Products – Temperature-stable solvents, adhesives, and industrial goods
  • Confectionery & Chocolate – Protect products prone to melting or spoilage
  • E-commerce & Specialty Goods – Direct-to-consumer frozen or organic shipments

Whether you’re shipping a container of avocados or a pallet of biologics, reefer technology ensures cargo quality at every stage.

Reefer Container Sizes and Specs

SizeExternal Dimensions (L x W x H)Cargo CapacityTemp Range
20ft Reefer20’ x 8’ x 8’6″~28–29 m³-30°C to +30°C
40ft Reefer HC40’ x 8’ x 9’6″~67–76 m³-30°C to +30°C

Note: Capacity can vary based on model, insulation, and cargo configuration.


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