What Temperature Should a Commercial Fridge or Freezer Be?

The 5°C and −18°C rules, the 2-hour/4-hour guide, and what it takes to hold temperature in an Australian kitchen
By the Chill Pro Refrigeration team · Updated September 2026

In Australia a commercial fridge holding potentially hazardous food must run at 5°C or colder, and a commercial freezer must keep food frozen hard — in practice −18°C or colder. Those two numbers come from the Australia New Zealand Food Standards Code, and they are the numbers an environmental health officer will check against.

Everything else in this guide is about the harder part: holding those numbers in a real kitchen, in an Australian summer, with the door opening every ninety seconds.

The short answer, by equipment type

Storage fridge or under-bench: 1°C to 4°C. Holding stock below the 5°C limit with headroom.
Glass-door display fridge: 2°C to 4°C. Merchandising while staying compliant.
Open multideck: 1°C to 3°C. High turnover, and it runs colder to survive the open front.
Chiller cool room: 0°C to 4°C. Bulk stock with a long dwell time.
Freezer, storage or display: −18°C to −22°C. Frozen hard, with a buffer for door openings.
Freezer cool room: −18°C to −25°C. Bulk frozen, blast-chilled or long-hold stock.
Dual-temperature cabinet: switchable chiller or freezer, for seasonal or mixed product ranges.

Set points are not the same as food temperature. The Code is written about the food, not the thermostat. Run the cabinet a degree or two below the legal limit so that a busy service, a warm delivery or a defrost cycle does not push the product over the line.

Why 5°C is the number that matters

Standard 3.2.2 of the Food Standards Code requires potentially hazardous food to be at 5°C or colder, or 60°C or hotter, when it is received, displayed, transported or stored. Between those two points sits the temperature danger zone, where food-poisoning bacteria multiply fastest.

Potentially hazardous food is the category that catches most of what a butcher, deli, grocer or café sells: raw and cooked meat, smallgoods, dairy, seafood, cooked rice and pasta, prepared salads, and anything containing egg. If you sell it, you are responsible for the temperature it was held at, including while it sat on the loading dock.

A business can hold food at another temperature, but only if it can demonstrate to an enforcement officer that it has a safe alternative system, validated and documented. For most small and mid-size food businesses, running to 5°C is simply cheaper than defending an alternative.

Freezers: −18°C, and why operators run colder

The Code requires frozen food to stay frozen hard. The working number across Australian industry, transport and cold chain is −18°C or colder, and it is the figure a supplier, an auditor and a supermarket buyer will all expect to see.

Most operators run somewhere between −18°C and −22°C. The extra few degrees are not about the food needing to be colder — they are a buffer. Every door opening, every warm load and every defrost cycle costs temperature, and a cabinet sitting exactly on −18°C has nowhere to give.
Choosing a commercial freezer for food retail means weighing that buffer more heavily than any headline spec.

Freezers also take time. A well-built commercial freezer will pull down to temperature in a few hours empty, but a full one loaded with room-temperature stock can take a day or more to stabilise. Load a new freezer empty, let it reach set point, then fill it.

The 2-hour / 4-hour guide and the two-stage cooling rule

Two separate rules get confused constantly, so it is worth separating them.

The 2-hour / 4-hour guide applies to ready-to-eat potentially hazardous food that has been out of temperature control, on a bench, on a buffet or in transit:

Under 2 hours total: use it immediately or return it to refrigeration.
Between 2 and 4 hours total: use it or sell it, but do not put it back in the fridge.
Over 4 hours total: discard it. No exceptions.

The clock is cumulative. Twenty minutes on a bench this morning and ninety minutes on display this afternoon is 110 minutes, not two separate short periods.

Two-stage cooling is a different rule, for food you have cooked and want to chill. The food must go from 60°C to 21°C within two hours, then from 21°C to 5°C within the next four hours. A domestic-style fridge cannot do this with a full gastronorm of hot stock — it simply raises the temperature of everything else in the cabinet. This is the single most common reason a food business outgrows its first fridge.

Display fridges and storage fridges are not the same problem

A storage fridge has one job: hold a set temperature behind a closed, insulated door. A display fridge has two jobs that pull against each other — hold temperature, and let customers see and reach the product.

That tension is why an open multideck runs colder than a glass-door cabinet: it is fighting an open front and an air curtain, not a gasket. It is also why a cabinet that is beautifully merchandised but overloaded above the load line will fail a temperature check even though nothing is wrong with the refrigeration. Stack to the load line, never above it, and leave the return air grille clear.

If you are specifying a cabinet from scratch, start with what it has to hold and how fast that stock turns over. Our guide on how to size a commercial display fridge works through the calculation.
What actually keeps products fresh longer is a separate question again: humidity, airflow and lighting matter as much as the set point does for shelf life.

Ambient heat: why Queensland is a different question

Every refrigeration cabinet is rated to a climate class — the ambient temperature and humidity it is designed to hold its set point in. A cabinet rated for a 25°C, 60% RH room will not hold −18°C in a Brisbane kitchen in February with the door to the car park propped open.

This is the most common cause of the freezer isn't working callouts we see across Brisbane and Sydney, and it is almost never a fault:

Ambient too high. A compressor in a hot, unventilated corner cannot reject heat. Give the condenser clear air.
Condenser blocked. Dust, grease and flour on the coil. A ten-minute clean every 90 days is the highest-return maintenance in the building.
Door seals and strip curtains. A gasket that no longer grips is a permanent open window.
Direct sun or a heat source. Glass-door cabinets in a shopfront window, or a fridge beside a fryer or oven.
Overloading. Product packed against the return air grille starves the evaporator.

Ambient heat also shows up on the power bill long before it shows up as a failure — a cabinet fighting its environment runs closer to 100% duty cycle.
How to reduce commercial refrigeration running costs covers this in detail. For bulk storage, a properly specified cool room is usually far cheaper per cubic metre to hold cold than a wall of upright cabinets.

Monitoring and records: what an audit actually looks for

Under the Code you must be able to demonstrate temperature control, not merely assert it. In practice that means:

A probe thermometer accurate to ±1°C, available on site. This is a specific requirement for businesses handling potentially hazardous food.
A recorded check at least daily. Most operators do open and close. Digital controllers with data logging make this automatic; a clipboard is still legal.
A receiving check. Temperature-check deliveries before you sign, and record it. The cold chain is only as strong as the loading dock.
A written corrective action. What staff do when a reading is out: move stock, call service, discard, record.
Calibration. Ice-slurry check your probe periodically and note it.

Remote monitoring with alerts is now standard on most commercial controllers, and it is the difference between losing a freezer of stock overnight and getting a text message at 11pm. If you are running a butcher shop or deli, the sequencing for all of this is set out in our butcher shop and deli refrigeration fit-out guide.

When the temperature is wrong, work through it in this order

1. Check the food, not the display. Probe the product between packs. A controller reading air temperature after a defrost cycle will show a spike the food never experienced.
2. Check the door. Seals, closers, strip curtains, and whether anyone has propped it open.
3. Check the condenser. Clean it, and check for clear airflow around it.
4. Check the load. Above the load line, blocking the grille, or hot product put in warm.
5. Check the ambient. Room temperature, sun, adjacent heat sources.
6. Then call for service. If the cabinet is clean, sealed, correctly loaded and in a reasonable ambient and still cannot hold temperature, it is a refrigeration fault: gas charge, controller, fan or compressor.

New equipment should not need step 6 in its first years. Ask what the warranty covers and who attends. Chill Pro supports equipment across Queensland and New South Wales and freights Australia-wide.
Delivery and installation is where most temperature problems are either prevented or created.

A note on cost

We do not publish prices, because the right answer depends on what you are holding, how much of it, how fast it turns over and where the equipment has to fit. What we can tell you before you commit is the running cost in kWh per day at your ambient, the warranty terms and the lead time. Chill Pro Trusted Finance Partners offer competitive rates in the market — ask us about it, and our services page sets out what is included.

Frequently asked questions

What temperature should a commercial fridge be set to in Australia?
Set it between 1°C and 4°C. The legal requirement in the Food Standards Code is that potentially hazardous food is held at 5°C or colder, so a set point of 5°C leaves no margin for door openings, restocking or defrost cycles.

What temperature should a commercial freezer be?
−18°C or colder. Most Australian operators run between −18°C and −22°C so that door openings and warm loads do not push the food above −18°C.

How long does a commercial fridge take to reach temperature?
An empty commercial fridge typically reaches set point within about an hour, and a freezer in a few hours. Loaded with room-temperature stock it takes far longer, sometimes a full day for a packed freezer. Always pull a new cabinet down to temperature empty before you load it.

What is the 2-hour / 4-hour rule?
It applies to ready-to-eat potentially hazardous food that has been out of refrigeration. Under two hours total, refrigerate it or use it. Between two and four hours, use or sell it but do not refrigerate it again. Over four hours, discard it. The time is cumulative across the day.

Why won't my freezer hold −18°C in summer?
Usually ambient heat rather than a fault: a blocked or dusty condenser, no clear air around the compressor, failed door seals, a cabinet in direct sun, or product stacked against the return air grille. Work through those before booking a service call.

If you are choosing equipment and want to be certain it will hold temperature in your room, not in a showroom, tell us what you are storing and where. We will specify to your ambient, your stock and your turnover.

Call 0456 680 882 or email sales@chillpro.com.au, or request a quote and we will come back with running costs, lead time and warranty in writing.

Chill Pro Refrigeration supplies and services commercial refrigeration across Queensland and New South Wales, with freight Australia-wide. Display fridges, freezers, cool rooms and complete fit-outs for butchers, grocers, supermarkets, cafés and food processors.