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FAQ

What temperature should my commercial upright freezer be set to for safe frozen storage?

Updated 19 Jul 2026 FAQs
FAQ
Quick answer

For Irish commercial kitchens, a practical target is -18°C or colder for frozen food storage.

Support note

Need more detail? For model comparisons, setup steps and troubleshooting, see the related guides below.

For Irish commercial kitchens, a practical target is -18°C or colder for frozen food storage.

Setpoint guidance:

Set the controller so the cabinet reliably holds -18°C even during busy periods. In many sites that means a setpoint around -18°C to -22°C, depending on door openings, load, and room temperature.

Remember the controller usually displays cabinet air temperature, which can swing during door openings and defrost. Your food safety decision should be based on a mix of logged air temps and periodic product checks (see below).

Verification tip (so you know it is truly holding):

Use a calibrated probe (or a check thermometer) and test between packs in the cabinet, not right at the door.

For higher confidence, do a weekly cross-check against a glycol bottle / simulated product or a known stable reference point and record the result in your HACCP logs.

Read the full guide: Unifrost Upright Freezer Temperature Controller Deep Dive Owner Hub.

Correct temperature drift in the right order

  • When temperature drifts during service, first reduce door-open time and confirm the gasket closes, then restore airflow gaps around stock and internal vents.
  • Only after those checks should an authorised user consider lowering the setpoint by 1-2 C, followed by a full stabilisation and independent temperature check.
  • For a service-line freezer, -20 C is a practical starting point where the model manual permits it; the controlling outcome remains frozen food held at or below -18 C.
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