Fish cold storage temperature and system requirements
Fish is one of the most temperature-sensitive commodities in the cold chain, and the refrigeration requirement is driven far more by pull-down and freezing duty than by holding load. Sizing a fish cold store around holding temperature alone is the most common cause of under-capacity in fisheries projects.
| Condition | Indicative temperature | Humidity | Engineering note |
|---|---|---|---|
| Fresh / on ice (short holding) | 0 to +2 °C | 90–95 % RH | Ice contact and rapid handling dominate; holding time is short by design. |
| Chilled processing area | +2 to +6 °C | 85–90 % RH | Process room load includes people, equipment and frequent door traffic. |
| Frozen storage | −18 to −25 °C | 90–95 % RH | Lower temperatures are common for long-term and export-grade frozen fish. |
| Blast / IQF freezing | −30 to −40 °C air | n/a | Sized on batch size, entering temperature and required freezing time, not on room volume. |
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
Pull-down and freezing duty
Freezing capacity is defined by tonnes per batch, entering product temperature, target core temperature and the required freezing time. This duty is typically several times the holding load of the storage room it feeds.
Humidity and weight loss
Low relative humidity accelerates dehydration and weight loss in unwrapped product. Evaporator selection and temperature difference across the coil directly influence this.
Airflow and stacking
Uniform air distribution matters more in fish rooms than in most commodities because product is often stacked densely in boxes with limited internal air paths.
Doors and throughput
High-throughput fisheries dispatch doors add substantial infiltration load. Air curtains, vestibules and dock seals should be scoped from the start.
Power reliability
In fisheries markets with unstable grids, backup power and monitoring are part of the refrigeration specification, not an optional extra.
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.
A senior cold-chain specialist stays with your project from first brief to commissioning.
Related
Frequently asked
One brief, comparable quotes from vetted cold storage suppliers and EPCs.