Our Technology



You’ve probably already experienced the cooling sensation of air touching your damp skin. Adiabatic technology harnesses this natural phenomenon, which occurs when water transitions from liquid to vapor.
Existing adiabatic systems take advantage of this effect in different ways: directly, by humidifying the air, or indirectly, without adding moisture to it.
Caeli Énergie’s technology is an indirect process that cools air far more effectively than any other adiabatic system—down to the dew point, the temperature at which condensation naturally forms. Our modules achieve a COP (coefficient of performance) between 10 and 20, depending on conditions—five times higher than conventional air conditioners.
En savoir plusCaeli is a revolution ...
... not a miracle
Pioneering eco-responsible technology comes with a sense of humility


Because there is still much to be done. Aware of our own limitations, here are the areas we are working on to enhance our positive impact on the environment:
While our technology works perfectly in temperate zones and dry heat, it is less effective in high humidity. The dew point represents a physical limit that would prevent our solution from being used in regions like Southeast Asia.
We have placed energy efficiency and sustainability at the heart of our production processes, with a particular focus on responsible water management. Our solution is specifically designed to use water optimally, only during the evaporation process, which plays a key role in cooling the air.
Unlike traditional adiabatic systems, our equipment does not humidify the surrounding air and does not require a lift pump. Over the course of a four-month season, our technology consumes an average of 1 to 2 m³ of water to generate 2000W of cooling. By comparison, the average French person uses around 54 m³ of water per year for daily needs (drinking, heating, hygiene), which is then polluted and requires treatment.
The water we use, on the other hand, returns to the atmosphere completely clean, without the need for further treatment. In other words, we ensure thermal comfort throughout the summer using the equivalent of the water from about fifteen showers.
Today, over 75% of our components (in terms of value) are sourced within 400km of our factory. We are doing everything we can to continue increasing this percentage.
What are the differences with direct adiabatic systems ?
These systems, simple and compact, cool the air by passing it through a moist material, similar to the human sweating process. While energy-efficient and low-cost, they have a major drawback: the humidity they generate significantly impacts the perceived comfort. Additionally, direct adiabatic cooling consumes a large amount of water, making it less sustainable in the long run.
They combine a direct adiabatic cooler with a heat exchanger to cool incoming air without increasing indoor humidity, thereby reducing health risks. Although bulkier and more expensive, they offer limited cooling power and are primarily used in warehouses and commercial buildings, but are not suitable for residential use.