Potato cold storage temperature, curing and ventilation requirements
Potato stores behave differently from most cold rooms: ventilation and humidity management matter as much as refrigeration, temperature depends on end use, and storing too cold causes sugar accumulation that ruins processing crops.
| Condition | Indicative temperature | Humidity | Engineering note |
|---|---|---|---|
| Curing (post-harvest) | +12 to +18 °C | 90–95 % RH | Wound healing before cool-down; ventilation-driven. |
| Table / seed potatoes | +3 to +6 °C | 90–95 % RH | Sprout control strategy required for long storage. |
| Processing (crisping/frying) crops | +7 to +10 °C | 90–95 % RH | Colder storage causes sugar accumulation and darkening on frying. |
| Long-term bulk storage | Crop and market dependent | 90–95 % RH | Airflow uniformity through the pile is the design driver. |
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
Ventilation before refrigeration
Bulk potato stores are ventilation systems with refrigeration attached. Duct design, fan sizing and airflow per tonne dominate the specification.
Respiration heat
The crop generates heat continuously; load calculation must include respiration, not just transmission and infiltration.
Condensation control
Uncontrolled condensation on the pile surface drives rot; humidity and air temperature differentials must be managed.
End-use temperature
Processing crops are stored warmer than table crops to avoid cold-induced sweetening — a commercial requirement, not a preference.
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.