A refrigerated storage container, also known as a “reefer container,” is a temperature-controlled portable shipping container. They are originally designed to be used in intermodal freight transportation and carry temperature-sensitive or climate-controlled items overseas. However, as more and more businesses and households re-purpose shipping containers, they are now used for more than just overseas travel. Despite their name, they can keep perishable items either warm or cool, depending on your needs. They are capable of controlling a very wide range of internal temperatures – ranging from -85 degrees F to over 100 degrees F.
How Do They Work?
Since they can control for such a wide range of temperatures, many people want to know how exactly reefer containers work. Refrigerated storage containers typically work using either integrated or external cooling units, T-flooring, and insulated walls.
A majority of refrigerated storage containers use an internal temperature regulation unit. These are installed inside of the container and either keep items cool or warm. Eventually, an integrated unit will require an external power source on land or on their cargo ship, also known as a “reefer point,” to recharge.
Once the internal power source is up and running, it works by ventilating warm air away from the container. If you need to control for a warmer temperature, it would do the opposite – feed warm air into the container. In order for this process to work, you need to have consistent airflow around the container at all times. If you are using the container in an area without consistent air flow, you would need a water cooling system to maintain your ideal temperature.
External or Clip-on Unit
If a reefer container will not have access to a “reefer point” for an extended period of time, they can rely on an external diesel-powered generator. You would simply by attach the generator to the outside of the container. This enables airflow through duct work or portholes that let air enter and exit the container. Refrigerated storage containers also have a layer of insulation installed on the interior to restrict temperature change.
Refrigerated storage containers also use metal or aluminum T-flooring, which is different than a traditional storage container’s plywood floors. Essentially, it creates an elevated floor to keep contents of the container raised slightly above the ground level. This allows cold or warm air to flow consistently underneath.
Keep in mind that due to the structure of T-floors, it is usually not suitable to use these containers for residential or office space without modifying it. This is because the T-floors have gaps in between its metal slats, which can catch furniture legs and shoes, and hold dirt. In order to modify the T-floors to use the reefer container for a container home or office, you would need to cover it with another type of flooring. You can also remove the T-flooring entirely.
Traditional storage containers have corrugated steel walls. However, refrigerated storage containers have more layers of insulation built in to keep the contents cooled. Walls inside a reefer container will consist of a stainless steel sheet, foam insulation, and an aluminum sheet.
What are the Benefits of Refrigerated Storage Containers?
Wide Range of Temperature Control
As mentioned, a reefer container has the ability to control a very wide range of temperatures. They can maintain an internal temperature of anywhere from -85 degrees F to over 100 degrees F. Whether you need a container to store goods in a warm or cool temperature, a reefer container can handle it.
Rental and Purchase Options
You have the option to either rent a refrigerated storage container for a given period of time or purchase it outright. If it’s more convenient for you, you can even rent them out on a month-to-month basis. This makes them highly flexible to suit a wide variety of commercial or residential needs. To learn more about rental options, take a look at our storage container renter’s guide.
Like traditional storage containers, reefer containers can be transported and re-located very easily and conveniently. Normally, a supplier delivers it via a flatbed truck and uses a crane to lower it onto your location. Suppliers can typically deliver within weeks, and have it set up for use in no time. If you are renting, the supplier will return to pick up the container after your rental period is over.
Refrigerated storage containers are built to enable versatile airflow at all times throughout the container. This makes sure items inside are kept at their ideal temperature at all times. Depending on the temperature you need to maintain inside the container, airflow will either move around the goods or between the goods to keep them frozen, chilled, or warm.
What are Refrigerated Storage Containers Used for?
Reefer containers are highly reliable in keeping goods at almost any internal temperature you need. This makes them great solutions for a variety of commercial and residential needs.
Transportation of perishables
Refrigerated storage containers were originally designed to transport perishable goods overseas. If you need to transport food, drinks, or other perishables a long distance, a reefer container can help you do so. For instance, a warehouse, manufacturer, or wholesaler may need to use a reefer container to ship items like food to a grocery store location.
Restaurants often have to store perishable food and drinks, and need a climate controlled container to do so. Reefer containers can be easily moved to and from a restaurant and conveniently sit almost anywhere on-site.
Healthcare facilities often have to store necessities like medicines and vaccines for patients. Many of these medicines require strict climate-control in order to remain effective. Especially in times of higher-than-usual patient demand, healthcare practices often look into renting or buying a refrigerated container.
Residential or building purposes
Because of their high-grade insulated walls, reefer containers can be great to re-purpose as homes, studios, or office spaces. Remember that you will have to modify the T-flooring in a reefer container in order to use it for home or office needs. If you don’t particularly need the climate-controlling feature, you can opt for a ground-level office container (GLO) or a mobile office with air conditioning for your office needs.
Many retail stores sell items that require storage in a climate-controlled environment. Retail operations that sell things like flowers, wine, or plants may need a reefer container to keep these items at a consistent temperature. Additionally, retail business owners can rent or buy a reefer container to either house their business operations or use on-site for storage purposes.
Festivals and Concerts
Oftentimes, local communities will need refrigerated storage containers to host outdoor festivals, concerts, carnivals, fairs, or other public gatherings. This allows vendors to keep their items cool or frozen throughout the day. They are great to store beer, wine, ice cream, and other chilled refreshments.
Refrigerated storage containers can offer assistance during an emergency or disaster. For instance, they can keep food, water, drinks, medicine, and other necessities at a consistent temperature for long periods of time. They can be of great use for disaster shelters or residential locations for individual families. In this way, they are extremely reliable in keeping communities safe.
What Sizes are Available?
Like traditional storage containers, refrigerated storage containers come in standard sizes of:
Most suppliers also offer high-cube reefer containers. These are 1 foot taller than standard sized containers.
Additionally, because of the added cooling/heating unit, the internal size of the reefer container will be different than a traditional container. Integrated units installed on the inside will occupy 1-2 feet of space at one end of the container. This means that you will likely lose 1-2 feet of space internally. Additionally, the interior dimensions of a reefer container are slightly smaller than those of a traditional container. This is due to the layer of insulation inside the container’s walls.
How Much Do They Cost?
Depending on whether your container is brand new, refurbished, or used, the cost varies. In fact, refrigerated containers come in a wide variety of conditions. The condition will directly impact the rental or purchase price.
- 20-foot refrigerated containers can range from $3,000-$7,000 depending on the condition, and high-cubes will often cost more.
- 40-foot refrigerated containers can range from $4,000-$12,000 depending on the condition, and high-cubes will often cost more.
- Rental costs can range between $30-$85 or more per day.
Keep in mind that refrigerated storage containers usually cost more than traditional containers. To get an idea about the cost of storage containers, take a look at our pricing guide.