Blast Chiller vs Blast Freezer: What's the Difference? (Irish Kitchen Guide 2026)

A blast chiller pulls the heat out of freshly cooked food fast, down to a safe fridge temperature. A blast freezer (often called a shock freezer) does the same job but carries on down to freezing, usually -18°C at the core. Most commercial units sold in Ireland do both, so the real question is rarely "chiller or freezer" and more "how much do I need to chill, how much do I need to freeze, and how often?"

If you're short on time, our full range of blast chillers and shock freezers is sorted by tray capacity. If you'd rather understand the difference first, read on. We've pulled together the questions Irish kitchens actually ask.

What is a blast chiller?

It's a cabinet with very powerful refrigeration and fans that drive cold air across hot food, much faster than a normal fridge could. The point is to get cooked food through the temperature range where bacteria multiply quickly, then hold it safely chilled until you need it.

The listed performance on the units we sell gives you a feel for it. The Infrico IABT51L is rated to take food from +70°C to +3°C in under 90 minutes. The Combisteel 5x 1/1 GN blast chiller lists +80°C to +3°C in 90 minutes. A domestic or standard commercial fridge would take hours to do the same, and would warm everything else inside while it tried.

What is a blast freezer, and is it the same as a shock freezer?

Yes, in a kitchen those two names mean the same thing. A blast freezer (or shock freezer) uses the same rapid air movement but keeps going until the core of the food reaches freezing temperature. The same two units above list it too: the Infrico gives +70°C to -18°C in under 270 minutes, and the Combisteel lists +80°C to -18°C in 240 minutes.

Notice the time difference. Freezing takes roughly three times as long as chilling, and the load you can freeze in one go is smaller than the load you can chill. Check the listing for kg per cycle, because the freezing figure is always the lower of the two numbers.

Blast chiller vs blast freezer: what's the actual difference?

Here's the honest answer. It's usually one machine with two programmes.

• Chill cycle: brings cooked food down to around +3°C at the core. Used for batch cooking, sauces, soups, stews, rice and anything you plan to use within a few days.
• Freeze cycle: takes it right down to -18°C at the core. Used when you're cooking ahead for longer than a few days, or portioning and storing for later.
• Chill only models: they exist, but most kitchens end up wishing they'd bought a chiller/freezer once they see how handy the freeze cycle is.

So when you see listings called "blast chiller", "blast chiller/freezer" or "shock freezer", check the temperature range in the spec rather than going by the name. A unit that shows -18°C as its lowest setting can freeze. One that stops at a fridge temperature can't.

Is a blast freezer the same as a flash freezer?

Not quite. "Flash freezing" is a looser term, often used for very fast industrial freezing in food factories. In a restaurant, café or hotel kitchen, a shock freezer is the equivalent: fast freezing in a cabinet. If a supplier or a chef says "flash freezer" to you, it's worth asking what exact temperature and time they mean.

Why not just use a normal freezer?

This is the one that catches people out. A standard freezer (chest, upright or under counter) is built to hold food that's already frozen. It isn't built to drag the heat out of a warm tray of food. Put hot or even warm food in and it works hard, warms up what's already inside, and freezes your food slowly. Slow freezing tends to form bigger ice crystals, which damage texture and leave food watery when it thaws.

Fast freezing forms smaller crystals, which is why a shock freezer gives better quality when you defrost. If you're only storing bought-in frozen goods, a regular unit is the right tool. Our post on chest freezer vs upright freezer for a commercial kitchen will help you pick between those.

Is a blast chiller colder than a freezer?

The coldest it gets is about the same, around -18°C for a freeze cycle. What's different is the power and the airflow. A blast chiller is built to remove heat quickly, a freezer is built to maintain a temperature. Think of it as sprinting versus holding steady.

How cold does a blast chiller get, and how long does it take?

From the specs of units we list:

• Chilling to +3°C at the core: about 90 minutes
• Freezing to -18°C at the core: about 240 to 270 minutes

The Maxima 09400924 lists a lowest temperature of -18°C and takes 3 x 1/1 GN trays, so it's a good example of a compact unit that can do both. Actual time depends on how much food is in there, how thick it is, and how hot it starts. Shallow trays chill much faster than deep pots, so get into the habit of spreading food out in GN trays rather than loading a big stockpot.

How do I work out what size I need?

Start with how much you cook in one batch, not how big the kitchen is. A few rules of thumb we'd stick to:

• Small café, deli or a pub doing food: 3 to 5 tray units. These fit under a counter or in a corner and handle a couple of batches a day.
• Restaurant or hotel with a proper menu: 10 tray units, such as the Combisteel 10x 1/1 GN or the Atosa EBF10. Plenty of room for big batch cooking.
• Large kitchens, caterers, production units: 14 to 15 tray units or roll-in rack models.

Two things to check on the spec sheet. First, the tray spacing. The 5 tray Combisteel, for example, lists 5 x 1/1 GN at 40 mm depth but only 3 at 65 mm, so deeper pans mean fewer trays. Second, the footprint and power: that same model is 800 x 800 x 1000 mm and draws 0.75 kW on a normal 230V supply, and it's rated for ambient temperatures up to 32°C, so don't squeeze it somewhere with no airflow beside a hot range. Always leave the clearance the manual asks for.

How much does a blast chiller cost in Ireland?

It depends mostly on tray capacity. Based on what we currently list, and always quoted ex VAT, you're looking at roughly:

• Compact 3 tray units: from around €1,200 to €3,000
• 5 tray units: roughly €2,500 to €4,000
• 10 tray units: roughly €2,800 to €6,000
• 14 to 15 tray and larger rack models: roughly €4,000 up to €9,700

Those are ranges, not quotes, and they move with brand, refrigerant, build quality and whether the unit also has a core probe. The blast chiller collection shows the current ex VAT price on every model, so you can see exactly where your budget lands. Don't forget to factor in electrical connection and any space you need to make.

Which brand of blast chiller is best?

Honestly, there isn't a single best brand, and anyone who tells you otherwise is selling one. We stock Combisteel, Infrico, Atosa, Maxima, Blizzard and others, and what matters is fit for your kitchen: tray count, whether you need freeze capacity, warranty length, delivery time and whether it will physically fit through your door. Compare the same tray count side by side, look at the listed chill and freeze times, and check the warranty line on each listing.

Do I actually need one?

If you cook in batches and keep food for later service, almost certainly yes. It protects your food safety records, cuts waste, lets you cook once and serve across several days, and in a busy kitchen it frees up fridge space, because you're not leaving pots on the side to cool for hours.

If you only prep to order and rarely hold cooked food, you may be fine with a good fridge. Our comparison of a blast chiller vs a standard fridge goes through that decision in detail, and how to use a blast chiller covers the day to day routine once you have one.

One practical note for food safety: your HACCP plan should say what core temperature you chill and freeze to, and how you record it. Check the specifics with your local environmental health officer, because what's expected can vary by type of business.

Quick FAQ

Can I put hot food straight into a blast chiller?

Yes, that's what it's for. Units are rated from +70°C or +80°C starting temperatures. Use shallow trays and don't overfill, so air can circulate round the food.

Can a blast chiller replace my walk in or reach in fridge?

No. It's a processing tool, not a storage unit. Once food has been chilled, move it into your normal fridge or cold room.

Do blast chillers need a lot of power?

The compact models we list run on a standard 230V supply, for example 0.75 kW for the 5 tray Combisteel. Check each listing for its power rating before ordering.

Which refrigerant do they use?

The ones mentioned here use R290 (propane), a natural refrigerant, which is common in newer commercial units.

Ready to pick one?

Have a browse of our blast chillers and shock freezers, where every listing shows the ex VAT price and warranty. Not sure what size fits your menu? Tell us roughly how many covers you do and what you batch cook, and we'll point you at the right size. What are you cooking most of: soups and stews, meat, or bakery?