What temperature should a commercial upright freezer run at for food safety?

For Irish food operations, the practical target is:

Setpoint: typically -18°C for frozen storage.

Working tolerance: brief rises during door openings are normal, but the freezer should recover back to the setpoint reliably.

Two useful checks for food safety and inspections:

Measure product, not just air: verify with a calibrated probe between packs or in a test pack, because the controller usually reads air temperature at the cabinet probe.

Log consistently: record temperatures at the same time(s) each day and note unusual events (delivery loading, power outage, doors left ajar) so your HACCP record tells the full story.

Read the full guide: Unifrost Upright Freezer Temperature Controller: New Owner Quick Checks Guide.