Choosing EX-Reefer Insulated Containers vs. Standard Dry Insulated Containers

2026-08-14

Both types offer thermal insulation; they feature passive insulation designs with built-in thermal barriers. They do not actively cool or heat the interior but merely slow down temperature fluctuations, functioning much like large thermal flasks. The EX-Reefer is a specific type of insulated containercreated by removing the cooling unit from a retired reefer Container and sealing the opening with a metal cover and insulation layer. In contrast, standard dry insulated containers do not match the build quality or materials of reefer-derived insulated containers; we compare the two here to help you make an informed purchasing decision.

	Reefer Insulated Container / EX‑Reefer (De‑commissioned Reefer)	Dry Container with Retro‑fitted Insulation
Insulation Structure	High‑pressure integral PU foam injected between steel plate layers, no air gaps	Factory‑filled insulation with low leakage risk. Air gaps may occur for second‑hand retrofitted units
Inner Wall Material	Stainless steel / aluminium alloy; moisture‑resistant, high‑pressure washable, food‑grade applicable	Insulation cotton + PVC / colour steel liner. Liner vulnerable to impact damage; moisture may penetrate into insulation layers
Floor	Original T‑shaped aluminium grating floor with built‑in bottom heavy‑duty insulation, drainage capability, high forklift load tolerance	Original plywood floor. Additional floor insulation required. Forklift operations may damage retro‑fitted insulation
Condensation Risk	Sandwich foam structure prevents moisture from contacting outer steel panels; very low condensation risk	Condensation easily forms between steel panels and insulation. Moisture ingress leads to insulation performance degradation
Ocean Shipping Qualification	Valid CSC certificate for regular ocean freight; ISO thermal‑performance container	Retrofit invalidates CSC for most shipping lines; suitable for on‑land application only
Internal Net Space	Original factory design. Space loss limited to former refrigeration unit opening; smooth inner walls	Each wall occupies additional 5‑8 cm inward space, significantly reducing internal dimensions
Service Life	10‑15 years, validated under offshore maritime conditions	3‑8 years. Insulation deteriorates rapidly once liner is damaged; heavily depends on workmanship quality
Weight	Slightly lighter than standard reefer container (refrigeration unit removed)	Base tare weight unchanged; extra weight added by insulation materials
Cost	Lower than standard reefer container (refrigeration unit deducted)	Overall lower initial cost

Based on the above, here are the recommended use cases:

For ocean shipping combined with onshore temperature-controlled storage: Prioritize Reefer Insulated Containers or EX-Reefer units, as they offer superior build quality and durability.

For fixed onshore use at a facility (e.g., temporary housing or moisture-proof storage) with a limited budget: You might opt for a standard dry insulated container treated with a spray-applied closed-cell foam coating. In this case, it is essential to install a complete vapor and moisture barrier, and the flooring must also be insulated and moisture-proofed.

We have compared the various differences and use cases of these insulated containers from multiple perspectives to help you select the right option for your needs. Please feel free to contact us for further product details and price quotes. With decades of manufacturing experience, we can also customize product specifications to meet your specific requirements.