How it works

Inspired by nature, to work with nature

A cool problem

From refrigerators that chill cans of cola in a hot Manhattan summer to those that store medicines and support blood banks in remote medical centres, refrigeration systems are essential to every part of people’s lives. But they’re inefficient. They need to have constant connection to power and, even in the best conditions, do not control temperature well.

But more than that, conventional coolers are in a constant battle with nature. While the sun heats the world vast amounts of energy are used to cool things down again. There is a need for a sustainable cooling solution that works. And keeps on working.

A simple idea

We started with water. It’s all around us but it’s also incredible. It has an amazing property that’s unique in the universe. At four degrees, water is at its heaviest. At four degrees it sinks. At any other temperature it rises. This scientific fact inspired us to create a new kind of refrigeration system. A seemingly intelligent system that adapts its temperature naturally so it automatically cools to the optimum temperature: a constant four degrees even without power.

A technology with no boundaries

Sure Chill technology works anywhere. With the ability to remain perfectly cool for long periods without power, our award winning technology works perfectly in places:

Where there is no power – just team it with solar

Where power is intermittent or erratic – efficient energy storage during power outages

Where power supply is not an issue – time-shift usage to cut costs and reduce peak demand

An ingenious solution

Sure Chill is a brand new kind of cooling system. It doesn’t need a constant power source. In an on-grid situation with intermittent power, it works perfectly well. In an off-grid situation, where a solar panel may be used, a Sure Chill powered refrigerator doesn’t even need a rechargeable battery. It shouldn’t work but it does. And it works beautifully.

Water surrounds a Sure Chill refrigeration compartment. When it has power, the water cools and forms ice above the compartment leaving only water at four degrees cooling the contents. When the power is switched off, the water warms and rises while the ice begins to melt, keeping only four-degree water cooling the contents of the compartment. So it has its own internal and entirely natural energy store that maintains a completely steady temperature. The system can operate like this, without power, for days and weeks.

A beautiful future

Sure Chill is a cooling system that’s life-changing. And life-saving. Because the system is based on a law of nature, appliances using it are reliable and robust even in the harshest environments. Because a Sure Chill refrigerator is designed to work without power for many days, it can help get life-saving medicines to remote communities. And because it’s Smart Grid ready, in places with advanced power networks it can be powered whenever energy is cheapest, saving money for consumers and energy companies as well as saving resources for the planet.

Meet our team of advisors

The technology is beautiful, is adaptable to suit any cooling requirement from food to data and is scalable from cool box to warehouse.


Sure Chill is a unique new cooling technology with the power to impact on people and business around the world.

Find us at

Sure Chill
Innovation Village
Cardiff Edge Business Park
Longwood Drive, Cardiff
CF14 7YU, United Kingdom


+44 (0) 3300 026 444