A fan and an air cooler are often mentioned in the same breath, but they are two different technologies for making a room more comfortable. The difference lies in exactly what happens to the air before it reaches you.
How a fan works
A fan moves air, but it does not cool that air. The temperature in the room therefore remains the same. The cooling effect you feel is because the airflow causes the sweat on your skin to evaporate faster, allowing your body to release heat. As soon as the airflow stops, that effect also disappears immediately.
How an air cooler works
An air cooler, such as the AirFlow SM211, works on a different principle: evaporative cooling. Water evaporates inside the device, and the air that is subsequently blown out is therefore a few degrees cooler and more humid than the ambient air. An air cooler does therefore indeed cool the air down slightly, unlike a fan. Important to know: an air cooler is not a full-fledged air conditioner. The cooling effect is more limited and drops significantly in high outdoor humidity.
When does which device work best?
In a dry, hot room, an air cooler comes into its own better, because evaporation then takes place efficiently and the extra moisture in the air is experienced as pleasant. In a humid environment, such as many Dutch summer days with high humidity, the water evaporates less effectively and you notice less cooling. A fan remains effective in that situation, because the cooling effect is not dependent on evaporation but simply on air movement.
Moisture and maintenance
An air cooler adds moisture to the air. In a bedroom that already feels damp or in a small, poorly ventilated room, that can work against you. An air cooler also requires more maintenance than a fan: you need to regularly refill, empty, and clean the water reservoir to prevent a musty smell or bacterial growth. A fan does not have that disadvantage and is therefore more maintenance-friendly.
Power consumption and price
Both devices use relatively little electricity compared to a real air conditioner, and are also considerably cheaper to purchase. A fan is generally the cheapest and simplest to use.
Direct answer: a fan moves air and feels cooling due to wind chill, while an air cooler actually cools the air down slightly with evaporating water and simultaneously makes it more humid. Choose a fan for a simple, low-maintenance solution and an air cooler if you want just that little bit of extra cooling and moisture in a dry, warm climate.
Looking for cooling? Check out the evaporative AirFlow SM211 air cooler or a powerful AirFlow AV25G fan on dynter.eu.