We get asked about this more often than you’d think, usually from someone who’s just started looking into refrigerated trucks and has run into both terms without a clear sense of whether they mean the same thing. They don’t — though the confusion is understandable, since both fall under the broader “reefer truck” umbrella and look fairly similar from the outside.

The short version: a chiller truck keeps cargo cool, and a freezer truck keeps it frozen. But that one-line difference has knock-on effects for the unit, the body, and sometimes even how the truck is driven and loaded. Here’s how it actually breaks down.

The temperature range is the real dividing line

A chiller truck is built to maintain temperatures roughly between 0°C and 8°C. This is the range for most fresh produce, dairy, bakery items, beverages, flowers, and chilled-but-not-frozen goods. The goal is to keep things cold enough to stay fresh and safe, without freezing them — which matters for products like fruit, vegetables, or dairy that would be damaged or change texture if they froze.

A freezer truck, on the other hand, is built to hold temperatures well below freezing — typically -18°C to -25°C, sometimes colder depending on the cargo. This range is for frozen goods that need to stay frozen the entire time: ice cream, frozen seafood, frozen meat, and similar products where any partial thawing during transport can be a food safety issue, not just a quality one.

It’s a meaningful difference, and not just numerically. A unit built to hold 4°C and a unit built to hold -20°C aren’t doing the same amount of work, even though both are technically “refrigeration.”

Why you can’t just turn a chiller down to freezer temperatures

This is probably the most common misconception we run into — the assumption that a chiller unit could just be set to a lower temperature and function as a freezer. In practice, it doesn’t really work that way.

Freezer units are built with more powerful compressors designed to handle the larger temperature difference between the inside of the truck and the outside air, especially in Singapore’s climate where ambient temperatures rarely drop below 24°C even at night. A chiller unit pushed to try to reach -20°C would likely run constantly without ever getting there, putting itself under far more strain than it’s designed for — and even if it did somehow get close, it probably wouldn’t hold that temperature reliably once the doors start opening.

There’s also the body to consider. Freezer trucks generally need thicker insulation than chiller trucks, because the temperature gap between inside and outside is so much larger, and any gaps or weak points in the insulation become a bigger problem the colder you’re trying to go.

What this means for door openings and loading

This is one of those details that doesn’t come up until someone’s actually using the truck day to day, but it affects both types differently.

For chiller trucks doing multi-drop deliveries — a common pattern for bakeries, florists, or beverage distributors — frequent door openings are manageable, since the unit only needs to bring the temperature back up a few degrees each time. It’s not ideal, but it’s within what the unit is built to handle.

For freezer trucks, frequent door openings are more of a concern. Each time the door opens, warm humid air rushes in, and at -20°C that moisture can actually freeze onto the evaporator coils, which over time affects the unit’s efficiency. This is part of why freezer trucks tend to be used more for fewer, larger drops rather than many small ones — though it’s not a hard rule, and businesses do run multi-drop frozen routes, just with more attention paid to how quickly doors are opened and closed.

Can one truck do both jobs?

Sometimes. Some operators use a freezer truck to transport chilled goods occasionally — running it at a higher setting for that trip — since a unit capable of -20°C can usually also hold 4°C without issue. The reverse generally isn’t true, for the reasons above.

There’s also the option of a multi-temperature truck, which uses internal partitions to maintain two different zones — frozen and chilled — within the same vehicle. This is useful for businesses that regularly deliver both types of goods on the same route, like a supermarket supplier carrying frozen meat and fresh produce on one trip. It’s a more specialised setup, and not every business needs it, but it’s worth knowing it exists if your cargo mix varies.

Figuring out which one fits your business

If most of what you transport falls into one category — say, you’re a bakery dealing exclusively in chilled goods, or a seafood distributor dealing exclusively in frozen — the choice is fairly straightforward. The harder cases are businesses whose product mix sits across both, or who expect it to change as they grow.

In those situations, it’s worth thinking not just about what you’re carrying today, but what you might be carrying in a year or two. A chiller truck bought now might not cover a frozen product line added later, and retrofitting a chiller unit and body to freezer specifications is usually more involved — and more expensive — than specifying it correctly from the start.

Not sure which you need?

If you’re still working out whether your business needs a chiller truck, a freezer truck, or something that handles both, get in touch with our team — describing your typical cargo and routes is usually enough for us to point you in the right direction.

FAQ

What’s the main difference between a chiller truck and a freezer truck?
A chiller truck maintains temperatures roughly between 0°C and 8°C for fresh, non-frozen goods. A freezer truck holds temperatures around -18°C to -25°C for cargo that needs to stay frozen throughout transport.

Can a chiller truck be used as a freezer truck by just lowering the temperature setting?
Not reliably. Freezer units have more powerful compressors and the body typically has thicker insulation, both built for a much larger temperature gap than a chiller unit is designed to handle.

Is a freezer truck suitable for multi-drop deliveries?
It can be, but frequent door openings affect freezer units more than chiller units, since warm humid air entering at very low temperatures can cause ice buildup on the evaporator over time. Freezer trucks are more commonly used for fewer, larger drops, though multi-drop frozen routes are possible with careful handling.

What if my business transports both chilled and frozen goods?
A multi-temperature truck with internal partitions can maintain separate chilled and frozen zones in one vehicle, which suits businesses with a mixed cargo profile on the same route.
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