Is −18 °C sufficient for frozen storage?

−18 °C is a widely used baseline, but longer storage duration, sensitive products and customer specifications frequently require colder conditions.

How much colder should storage run than the target product temperature?

Rather than adding an arbitrary margin, size the plant so that setpoint is held under peak throughput conditions; excess margin costs energy every hour of the year.

Does a distribution centre need freezing capacity?

Only if product arrives unfrozen. Most distribution centres receive frozen product and require holding and dispatch capacity instead.

Frozen food

Frozen food storage temperature and warehouse requirements

Frozen distribution facilities are dominated by throughput and dispatch, not by holding load. Door traffic, staging areas and truck loading are usually where temperature and energy performance are won or lost.

Condition	Indicative temperature	Humidity	Engineering note
Frozen storage (general)	−18 to −25 °C	90–95 % RH	−18 °C is the common baseline; colder for long-term or sensitive product.
Ice cream and sensitive frozen product	−25 to −30 °C	90–95 % RH	Quality-driven rather than safety-driven.
Dispatch / staging area	−5 to +2 °C typical	n/a	Buffer zone limits excursions during loading.
Blast freezing (if freezing on site)	−30 to −40 °C air	n/a	Separate duty from storage.

Values are indicative planning ranges used for early-stage refrigeration sizing and procurement. They do not replace product-specific food-safety, pharmaceutical, regulatory or customer requirements, which take precedence in every case. Confirm final conditions with your quality function and a qualified refrigeration engineer.

Refrigeration engineering considerations

Throughput over volume

Design around pallets in and out per day, not just pallet positions. Load peaks occur during receiving and dispatch windows.

Dispatch buffering

A tempered staging area or refrigerated dock substantially reduces excursions and infiltration into the main store.

Floor protection

Freezer floors require underfloor heating or ventilation to prevent frost heave; this is a structural requirement, not an option.

Automation

High-bay automated stores reduce door traffic and footprint but change the refrigeration, controls and power specification significantly.

From temperature to system requirement

1. Confirm the storage condition for your product and market.
2. Size the room — cold room size calculator.
3. Calculate the refrigeration duty — refrigeration load calculator.
4. Check operating cost — electricity cost calculator.
5. Send one brief to vetted suppliers — build an RFQ.

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One brief, comparable quotes from vetted cold storage suppliers and EPCs.

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