How much does an evaporative cooler lower the temperature?

When the heat arrives and temperatures begin to rise, it’s inevitable that the sweltering heat is felt even inside industrial warehouses. For this reason, it’s important to decide in advance how to air-condition different work environments and ensure a healthy and cool place for your collaborators during the summer months.

Industrial evaporative coolers are the ideal solution for cooling large spaces: thanks to the natural principle of adiabatic transformation, they manage to “cool down” the air without the use of refrigerant gases and save a significant amount of electrical energy.

So... how much does an evaporative cooler lower the temperature?

To determine this accurately, it’s important to consider some fundamental aspects. The absence of refrigerant gases and the low energy consumption used actually make the cooling process dependent on several external factors, primarily the relative humidity of the air and secondly its temperature.

Humidity: the factor that determines temperature reduction

As mentioned in the preceding lines, the efficiency of an evaporative cooling system depends on external climatic conditions, primarily the percentage of humidity present in the air.
As we know, adiabatic cooling operates through natural principle of water evaporation: the warm air drawn from outside passes through water-soaked cellular evaporative panels, releasing some of its heat to the water (which then evaporates) and gaining a percentage of humidity. This conditioned air is then introduced into workspaces at a more comfortable temperature.

funzionamento raffrescatore evaporativo

Evaporative Cooling:
what It Is, how it works, and why to choose it.

Based on this principle, it’s easy to understand that a dry and hot incoming airflow (thus lacking humidity) is much easier to cool compared to warm and humid air.

With this premise, we can state that, passing through an evaporative cooler, external air at 32°C with a relative humidity of 45% can cool down by about 8-10°C, entering the workspace at a temperature of around 24°C.

With the increase in humidity levels, however, the efficiency will decrease. This means that hot air already containing high humidity will have a lesser amount of moisture added to it, resulting in a less significant overall cooling effect.

Summing up the concept: the hotter and drier the day, the higher the performance of the evaporative cooling system.

The strong dependence on external weather conditions means that an evaporative cooler cannot guarantee a constant temperature throughout the entire summer period.
It’s important to take into consideration that, despite minor variations in terms of efficiency, these air conditioning systems are still capable of maintaining comfortable temperatures within work environments, without excessively cooling the air, and especially without drying it out.

Drier air, as in the case of a traditional air conditioner, may feel cooler and seemingly more comfortable, but it can lead to a persistent sensation of dryness in the throat over time, potentially affecting the well-being of employees.
On the other hand, the air emitted by an evaporative cooler is less cold and definitely less dry, thanks to the moisture it accumulates during the adiabatic process. This makes it much healthier for the overall mental and physical well-being of the staff.

Evaporative coolers help regulate humidity levels within warehouses and large industrial and commercial areas. This prevents the uncomfortable sticky feeling on the skin and promotes concentration, safety, and productivity.
Moreover, they are suitable for environments where it’s logistically challenging to keep doors and windows constantly closed, which is often the case with traditional air conditioning systems. Adiabatic cooling systems, therefore, maintain their efficiency even with open entrances and ensure a continuous circulation of fresh air in the working areas.

Natural cooling and energy savings

As you might have understood, this system is ideal for cooling industrial warehouses, storage facilities, workshops, and commercial spaces due to its remarkably low energy consumption.
The electrical energy used is solely dedicated to operating the fans and is around 20-25% of what a traditional air conditioning system would use.

Moreover, it’s an entirely natural and sustainable system. It doesn’t rely on refrigerant gases for operation; it only utilizes water, which is eventually released back into the environment after use. This makes it the perfect solution for aiming to be as environmentally friendly as possible and taking steps towards a future that’s more mindful of our planet.

Opinions on evaporative cooling

Listen to what those who have chosen to rely on an EUCOLD evaporative cooler have to say


"A custom-designed evaporative cooler tailored to our needs has been the optimal choice for us, aligning with our company philosophy. Our concern was about drying out our dough due to overly strong airflow. We are truly thrilled with the outcome achieved; we managed to lower the temperature within our work areas from 35 to 28 °C, and our staff can work in a comfortable environment without suffering from heat-induced fatigue."

Giovanni Da Re
Owner of Forno Da Re

"Those who were unfamiliar with this system strongly advised against it, convinced that generating cooling capacity for our facility with such low electrical power wasn't feasible. I am someone who believes in innovation, and I placed my trust in those who proposed it. The result is evident (and felt!). This is an absolutely efficient system that I am more than willing to recommend to anyone with the same needs we had."

Silvano Tonon
Owner of C.M.S

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