Choosing Commercial Fish and Seafood Cold Storage and Freezing Equipment: Capacity, Pull-Down and Quote Comparison
Commercial seafood freezing and cold-storage equipment should be specified by duty, not by catalogue size: product form and thickness, entry temperature, required core temperature, tonnes per day, holding days and your site conditions. Ask every supplier to quote against the same duty statement, then compare pull-down time, capacity at your ambient temperature, energy use, monitoring, service and the assumptions behind each number.
FishMatch Group editorial team · Editorial date
1. Chilled storage, freezing and frozen storage are three different duties
A chill room holds already-chilled product near the temperature of melting ice for a short time. A freezer — blast tunnel, plate, spiral or IQF — removes heat fast enough to take product through freezing. A frozen cold store holds already-frozen product at a stable low temperature. Using a cold store to freeze warm product, or a chill room to cool product down, overloads the equipment and harms quality.
The FAO/WHO Code of Practice asks for a time and temperature regime for freezing that takes into account equipment capacity, the product's thickness, shape and temperature, and production volume, so that product passes through the temperature range of maximum crystallisation as quickly as possible. It also asks that product entering the freezer be as uniform as possible in thickness, shape and temperature.
2. Write a duty statement before you ask for prices
Suppliers can only quote comparable equipment if they size it against the same facts. Put these in your RFQ:
- Species and product form: whole fish, fillets, head-on or headless shrimp, peeled, cooked, blocks or IQF
- Pack format: box size, block thickness, trays, master cartons and pallet pattern
- Product entry temperature and the required core temperature at the end of freezing
- Throughput: kilograms per hour and tonnes per peak day, plus shift pattern
- Storage: pallet positions or tonnes held, holding days before dispatch, seasonal peaks
- Site: design ambient temperature and humidity, available power and its reliability, water, floor space and ceiling height
- Operations: loading frequency, door openings, forklift traffic, cleaning routine
3. Capacity, throughput and pull-down time
A freezer's capacity is only meaningful at a stated product thickness, entry temperature and final core temperature. A tunnel rated on thin fillets will not hold that rating on whole fish or thick blocks. Ask suppliers to state freezing time for your product and pack, and the resulting throughput per hour and per day.
For rooms and cold stores, ask for the pull-down time from ambient to operating temperature when empty, and the recovery time after a typical loading event. Ask how the refrigeration load was calculated: product load, door openings, people and lighting, defrost and the design ambient temperature. Refrigeration specified for a cool climate often underperforms when installed in a hot, humid one.
| Equipment | Common use | Key numbers to request |
|---|---|---|
| Blast freezer or tunnel | Boxed or palletised fish and shrimp | Freezing time per pack, kg/h, air velocity, loading method |
| Plate freezer | Blocks of uniform thickness | Plate area, block thickness, cycle time, tonnes per day |
| IQF or spiral freezer | Individually frozen shrimp, portions and fillets | kg/h by product, dwell time, glazing integration, cleaning |
| Chill room | Short holding of chilled product | Operating range, pull-down and recovery time, humidity, air flow |
| Frozen cold store | Holding frozen product before dispatch | Pallet positions, operating range, temperature stability, defrost method |
4. Storage temperature and stability: specify, do not assume
FAO's cold-store chapter explains that frozen fish should be stored at temperatures appropriate for the species, type of product and intended storage time, and that lower temperatures generally extend storage life — with fatty species usually more sensitive than lean ones. It also notes that when store temperature fluctuates, moisture leaves the product and forms frost inside the pack. Stability matters as much as the setpoint.
The same source reports one design authority's calculation that, under specific conditions, running a store at -30 °C cost about 4 % more in total than at -20 °C, while noting that running costs rise by a larger percentage. That is a historical, condition-specific estimate, not a promise of your costs: ask each supplier to calculate energy use for your store, climate and tariff.
5. Energy, refrigerant and power resilience
Ask for the expected electrical demand and annual energy estimate at your design conditions, the refrigerant chosen and its local regulatory status, insulation type and thickness, door design and heaters, and the defrost method. Where the grid is unstable, include back-up power and an alarm plan: stored inventory is often worth more than the generator.
Treat any savings figure as a supplier claim until you can compare the same duty statement and the same tariff across quotes.
6. Monitoring, records and service
The Code of Practice recommends that cold storage facilities have a temperature monitoring device, preferably a continuous recording unit. Specify where sensors go (air and, where relevant, product), recording interval, alarm thresholds and who receives alarms, data access and export, and the calibration routine.
After-sales matters as much as the equipment: local service response time, spare parts held in country, operator training, and what the warranty actually covers.
7. RFQ checklist for seafood freezing and cold storage
Ask every supplier to answer the same questions in writing.
- Equipment type and model, with capacity at your product, pack, entry and core temperatures
- Freezing time and kg/h for each product you will run
- Room or store operating range, temperature stability and pull-down and recovery time
- Refrigeration load calculation and design ambient conditions used
- Power demand, annual energy estimate, refrigerant and insulation specification
- Monitoring, alarms, data access and calibration
- Installation scope, civil works, commissioning tests and acceptance criteria
- Delivery time, warranty, spare parts, local service and training
- Which hygiene or food-contact standards the materials meet, with evidence
8. Risks and trade-offs when comparing quotes
The lowest price often reflects a smaller duty, a milder design ambient temperature or a narrower installation scope. Larger capacity protects against harvest peaks and shipping delays but costs capital and energy when underused. Modular or containerised units can be faster to install and expand, but check temperature stability, access for cleaning and how they will be serviced. Put quotes side by side only after normalising the duty, scope and assumptions.
General guidance versus local requirements
This guide does not set storage temperatures or certify equipment. Product temperatures, refrigerant rules, building and electrical codes, and food-safety approvals vary by country and product. Confirm requirements with your buyer, a qualified engineer and the competent authority before you buy.
Frequently asked questions
What is the difference between a blast freezer and a cold store?
A blast freezer removes heat quickly to freeze warm or chilled product. A cold store holds product that is already frozen at a stable temperature. Using a cold store to freeze product overloads it and can harm quality.
How do I size a seafood blast freezer?
From peak tonnes per day, product form and thickness, pack format, entry temperature and required core temperature. Ask suppliers for freezing time and kilograms per hour on your actual product.
What storage temperature do frozen fish and shrimp need?
It depends on species, product and intended storage time, and on your buyer's and destination's requirements. FAO guidance notes that lower and more stable temperatures generally extend storage life. Write the target into your specification.
How much does a seafood cold room or freezer cost?
Prices depend on duty, scope, site and region, so FishMatch does not publish price ranges. Comparable quotes require the same duty statement, installation scope and design conditions.
Does FishMatch sell cold storage equipment?
No. FishMatch Group is supplier-neutral. For qualified projects from USD 250,000, our team reviews your brief and coordinates comparable proposals from relevant manufacturers and integrators.