Two cold rooms of the same size can differ sharply in price for one reason: the temperature they must hold. If you are comparing quotes or budgeting for a new room, the target temperature is the first thing to fix, because it quietly drives almost every other cost. This article explains why colder means costlier, compares the main temperature classes, and helps you choose the right one without paying for cold you do not need.

Why temperature drives the price

A lower target temperature raises cost through several linked effects. The gap between inside and outside grows, so heat leaks in faster and you need thicker insulation. The refrigeration system must do more work and often runs a different, more expensive configuration. Colder rooms also add parts a chiller never needs, such as heated door frames and floor protection against frost. None of these appear as one line called temperature, but together they reshape the whole quote.

The main temperature classes and what they cost

Chiller rooms (around 0 to 5 degrees Celsius)

Used for fresh produce, dairy, drinks, and short-term food storage. These are the cheapest class. Panels are moderate, the refrigeration system is straightforward, and no special frost protection is needed. If your goods do not need freezing, this is where you save.

Freezer rooms (around minus 18 to minus 25)

Used for frozen food and long-term storage. Cost rises noticeably. You need thicker panels, a larger or lower-temperature refrigeration system, a heated door frame to stop it icing shut, and a floor design that resists frost heave. Expect a clear step up in both purchase and running cost over a chiller.

Blast freezers and blast chillers

Used to pull temperature down fast, not just hold it. These are the most expensive per cubic metre because they need very high airflow and a large refrigeration capacity for a small volume. They are a processing tool, not bulk storage. Buy one only if rapid cooling is genuinely part of your operation.

A comparison at a glance

Class	Typical use	Relative price	Extra parts needed
Chiller	Fresh food, drinks	Lowest	None special
Freezer	Frozen storage	Higher	Heated door, frost-safe floor
Blast	Rapid cooling	Highest per m³	High airflow, large capacity

A real scenario

A food business asked for a freezer room to store both frozen meat and fresh vegetables together. Vegetables do not need freezing, so freezing them wastes energy and can damage quality. Splitting the space into a smaller freezer for meat and a larger chiller for produce cost less to run and stored the goods better. Matching temperature to the goods, not the other way round, saved money on day one and every month after.

Common mistakes and how to fix them

Over-specifying the temperature. Asking for a freezer when a chiller would do is one of the most common budget leaks. Fix: list what you actually store and its real temperature need.

Mixing incompatible goods in one room. One temperature rarely suits everything. Fix: group products by temperature and consider two rooms.

Confusing blast with bulk. A blast unit is for speed, not volume. Fix: separate your fast-cooling need from your storage need and size each on its own.

Action steps to choose the right class

• List every product and its required storage temperature.
• Group products into compatible temperature bands.
• Pick the warmest class that still preserves each group.
• Separate any genuine rapid-cooling need from bulk storage.
• Ask suppliers to quote each class separately so you can see the gap.

Conclusion

Temperature is the lever that sets most of your cold room price, so decide it deliberately and only go as cold as your goods truly require. Your next step: write down what you store and its temperature need, then request quotes for the exact class that fits, not a colder one bought for comfort.

Frequently asked questions

How much more does a freezer cost than a chiller?

Reliably more, driven by thicker panels, a stronger refrigeration system, and frost protection. The exact gap depends on size and site, so compare quotes for both classes on your own room rather than relying on a fixed multiplier.

Can one room switch between chiller and freezer temperatures?

Some systems can, but a convertible room is built to the colder, costlier standard and switching wastes energy. If you mostly need one temperature, a dedicated room is usually cheaper.

Do I need a blast freezer?

Only if you must cool product quickly for safety or quality, such as freshly cooked or freshly harvested goods. For simply holding already-cold stock, a standard freezer is far cheaper.

Why does a colder room raise my monthly bill, not just the purchase price?

A larger temperature gap means heat leaks in faster and the compressor works harder to remove it, so running cost climbs alongside the upfront price.

References

ASHRAE Handbook, Refrigeration volume, a widely recognised engineering reference covering storage temperature classes and refrigeration design.