Reefer Container Buying Guide for Cold Storage

Refrigerated containers (reefers) are built around a self-contained refrigeration unit — usually Thermo King or Carrier — mounted to one end of an insulated steel box.

Mount type matters: clip-on units sit on the outside of the container and are easier to service or swap; undermount units sit beneath the floor and free up a few inches of usable length inside, common on newer over-the-road reefers.

For farm and produce cold storage, ask about the unit's temperature range and whether it's been running consistently versus sitting idle — a unit that's been in active cold-chain service usually has a more predictable maintenance history than one that's been parked for years.

Pharmaceutical and other precision cold-chain uses should confirm calibration and temperature-logging capability before relying on a unit for regulated storage.

Reefer units pair with our Refrigeration Units & Gensets category as a cross-sell — if a container's onboard unit ever needs replacing, that's where to look for a compatible clip-on or undermount replacement.