Used 20ft Refrigerated Container: Uses, Conversions and Possible Fit-Outs

Why choose a used 20ft refrigerated container?

The used 20ft refrigerated container appeals for its balance of performance, mobility and cost. With a temperature range of -25°C to +25°C, it covers both freezing and positive-temperature storage. Its standardised dimensions (6.06 m x 2.44 m x 2.59 m) and internal volume of around 28.4 m³ make it a versatile tool for many sectors. Its tare weight of around 2,900 kg remains compatible with most container trucks and handling equipment.

Unlike a dry container, it includes an electric refrigeration unit and polyurethane foam insulation that maintain a precise setpoint. Buying used gives access to this technology at a lower price than new, while benefiting from tested, ready-to-use equipment when supplied by a professional.

Common uses of a used 20ft refrigerated container

Storage and transport of perishable goods

In the food industry, it serves as a mobile or fixed cold room for fruit and vegetables (0 to 8°C), dairy products, meat (around 0°C) and frozen goods (-18°C or lower). A 20ft container can hold around 10 Euro pallets (80 x 120 cm) on a single level, more with suitable stacking or shelving.

Storage of sensitive products

The pharmaceutical and cosmetics sectors use it for medicines, biological samples or heat-sensitive products, subject to the regulatory requirements specific to each field. Adding a temperature recorder provides cold chain traceability.

Events, worksites and living bases

Festivals, worksites, living bases or central kitchens gain a temporary cold store, operational as soon as it is connected to a suitable power supply. Its mobility is an asset: once placed on stabilised ground, it can be moved as needed.

Florists, horticulturists and laboratories

For cut flowers (2 to 5°C) or certain laboratory tests, the container provides a reliable, easy-to-clean thermal enclosure.

Possible conversions and fit-outs

A used refrigerated container can be adapted to specific needs, provided technical and regulatory constraints are respected. Here are the most common fit-outs.

Creating a fixed cold room

Adding shelves, rails or pallet racking optimises the volume. It is advisable to provide waterproof LED lighting, a recording thermometer and an alarm system in case of temperature drift. Installation must be carried out by a refrigeration professional.

Refrigerated workshop or technical room

Some craftsmen or manufacturers convert the container into a temperature-controlled work room: bakery, pastry-making, order preparation, light cleanroom. Insulation must then be adapted, an inner door added and ventilation suited to the activity provided.

Mobile laboratory or research unit

For field analyses or sampling campaigns, the container can be fitted with benches, fume hoods and scientific equipment. Temperature control and polyurethane foam insulation provide a stable base, but the electrical installation must be reinforced and secured.

Refrigerated sales area or stand

Markets, trade fairs or direct sales: the container can become a refrigerated point of sale with display case, counter and till. The fit-out must facilitate cleaning and comply with food hygiene standards.

Storage of chemicals or sensitive products

In the chemical or cosmetics industry, it can store heat-sensitive products, provided the compatibility of interior materials (stainless steel, aluminium) is checked and the safety rules specific to the stored products are respected.

Each conversion must be designed according to the final use, applicable regulations and the refrigeration unit's ability to maintain the setpoint despite modifications (frequent openings, heat input, etc.).

Points to check before purchase and conversion

Checking the refrigeration unit

It is essential to check the compressor, fans, absence of refrigerant leaks and temperature hold over several hours. A real-condition test with readings is recommended.

Sealing and insulation

Door seals, walls and floor must be inspected. Air or water infiltration reduces energy efficiency and can cause mould.

Structure and compliance

Perforating rust, major impacts or deformation compromise the container's integrity and transport compliance. The CSC plate must be valid, and the ATP certificate may be required for transporting perishable goods.

Documents and traceability

Invoice, transfer certificate, CSC plate, ATP certificate where applicable: these documents must accompany the purchase. A maintenance log is a plus for tracking history.

Installation and electrical connection

For a fixed installation, the ground must be level and stabilised (concrete slab or compacted gravel bed). Allow space around the refrigeration unit for access and ventilation. The power supply must be protected by a residual current circuit breaker suited to the unit's power (generally between 3 and 6 kW). A cable of sufficient cross-section must be run from the electrical panel, in accordance with NF C 15-100. Outdoors, a canopy protects the refrigeration unit from weather and sun, improving its efficiency and lifespan. Secure access with a padlock on the locks.

Routine care and preventive maintenance

Clean the interior regularly with food-safe products, without high-pressure water jets on the refrigeration unit. Dust filters and exchangers to prevent clogging. Check door seals and replace them as soon as they lose elasticity. An annual check by a refrigeration technician is recommended to verify circuit sealing, pressure and control components. Wear parts (compressor, fans, contactors, sensors) must be monitored. A maintenance contract with a qualified refrigeration engineer ensures rapid response in case of breakdown.

Preparation before loading

Pre-cool the container to the setpoint temperature before placing goods inside, especially if they are already cold. Palletise and space products to promote air circulation. Do not obstruct evaporators or ventilation grilles. Load quickly to avoid breaking the cold chain. Check that seals are clean and locks are properly engaged. For long transports, use a standalone temperature recorder.

Rental or purchase: which option to choose?

Rental suits occasional or seasonal needs: it avoids tying up cash and generally includes maintenance and repairs. Buying a used 20ft refrigerated container is more attractive for regular or permanent use. The sale price of this model is €4,140.00 excl. VAT. Rental also lets you test the equipment before buying.

Comparison with other cold storage solutions

The 40ft refrigerated container offers double the volume (around 67 m³) and can hold 20 to 22 pallets, but it is less manoeuvrable. The 10ft, rarer, suits small spaces. The 20ft dry container is cheaper but does not regulate temperature. The reefer high cube (9'6" high) offers more volume but is less common used. A fixed cold room in sandwich panels offers better insulation and modularity, but it is immobile and requires construction work. The used refrigerated container represents an attractive compromise between cost, mobility and performance.

Regulations and standards

A refrigerated container used for international transport must meet ISO 668 and ISO 1496-1 standards, and have a valid CSC plate. For transporting perishable goods, ATP certification is often required. In France, use as a fixed cold room may require a declaration to veterinary services if animal products are stored. For a permanent installation, check local planning rules. The electrical connection must be made in accordance with NF C 15-100 by a qualified professional.

Energy consumption and optimisation

A 20ft refrigerated container consumes on average between 3 and 8 kWh depending on outside temperature, setpoint and insulation condition. In summer, consumption can increase. Check the condition of seals and insulation to limit costs. A programmable thermostat or monitoring system helps optimise cycles. For sensitive installations, a temperature recorder logs readings, often required in pharmaceuticals or food.

Interior fit-outs: optimising space and hygiene

The interior fit-out of a used 20ft refrigerated container determines its efficiency and ease of maintenance. The usable volume of around 28.4 m³ allows the space to be organised in many ways, provided cold air circulation is not hindered.

Shelving and pallet racking

For storage use, galvanised or stainless steel shelving is recommended. It must be fixed to the floor or walls without piercing the insulating panels, to avoid creating thermal bridges. Upright pallet racking allows stacking on two or three levels, but the floor's load capacity, generally limited, must be checked. An alternative is to use light shelving for parcels and small packaging.

Lighting and sockets

Lighting must be suited to low temperatures: IP65 waterproof LEDs are common. Luminaires must be fixed without piercing the insulating envelope. For sockets, provide waterproof boxes and cold-resistant wiring. All electrical work must be carried out by a professional.

Floor and protection

The original floor (28 mm marine plywood or T-profile aluminium depending on model) can be protected with mats or anti-slip plates. In traffic areas, a resistant coating limits wear. Avoid abrasive products that would scratch the surface and encourage moisture accumulation.

Hygiene and cleaning

For food use, interior surfaces (stainless steel or aluminium) must remain smooth and easy to clean. Provide a water point nearby, or a dry cleaning system, and avoid inaccessible corners. Door seals should be cleaned regularly to prevent mould.

Exterior customisation and site integration

Beyond the interior, the container's exterior can be adapted to its environment. Paint suited to corten steel protects the structure and improves aesthetics. Signage panels showing the setpoint temperature and safety instructions are recommended. If the container is visible to the public, wood or composite cladding can integrate it architecturally, provided the refrigeration unit's ventilation is not obstructed.

For outdoor installations, a canopy or awning protects the refrigeration unit from sun and rain. Exterior lighting and a camera can secure access. Finally, provide vehicle access for deliveries and collections, as well as a manoeuvring area for handling equipment.

Technical constraints to respect during conversion

Do not degrade insulation

Any cut in the walls (for a door, window or duct) must be made carefully and filled with equivalent insulating material. Compromised insulation leads to excess consumption and temperature variations.

Preserve air circulation

Evaporators and ventilation grilles must never be obstructed. Too dense or poorly designed a fit-out can create hot spots and compromise product preservation.

Respect load capacity

The floor and structure have load limits. Heavy pallet racking or dense storage must be approved by a professional. The 2,900 kg tare weight and payload must be taken into account during transport.

Anticipate maintenance

A fit-out that makes access to the refrigeration unit or filters difficult complicates maintenance. Allow clearance space around technical equipment.

When to call a professional?

Some conversions are within reach of an experienced DIYer, but others require a refrigeration engineer, qualified electrician or locksmith. Electrical connection, handling the refrigeration circuit, cutting insulating walls and modifying the structure must be entrusted to professionals. An experienced installer will also check material compatibility with the intended use and comply with current standards.

Calling a professional also helps preserve any warranty on the refrigeration unit and obtain a document certifying the installation's compliance, useful in case of inspection.

Conclusion

The used 20ft refrigerated container is a versatile, robust and economical piece of equipment. It combines the standardisation of maritime transport with the performance of a mobile cold room. Its uses are varied: food storage, pharmaceuticals, events, refrigerated workshop. The possible conversions and fit-outs allow it to be adapted to specific needs, provided technical and regulatory constraints are respected. A successful purchase relies on rigorous technical inspection and regular maintenance. For any questions, our team based in Marseille is at your disposal.