Air cooler vs. air conditioner
Differences in cooling with mobile air coolers and air conditioners
Some basics about cooling technology for a better understanding:
With air coolers and air conditioners the situation is much like that of a bike and a car. At first sight, both seem to serve the same purpose, yet technically these are completely different systems that allow not direct comparison with one another.
Air coolers, such as the PAE 25, are direct evaporation air coolers and unlike air conditioners do not come equipped with a cooling unit (like a fridge). Air coolers use the natural principle of water evaporation to cool the room air. Everyone knows this cooling effect, for example from sweat evaporation or cooler air in the vicinity of water falls, rivers and lakes.
A principally similar method is often applied out of doors (outdoor cafés, marquees etc.). A fine jet of water is guided in front of the air current of a fan resulting in an ultra-fine spray mist. During this dispersal to create a sort of atomized spray the droplets evaporate and in doing so cool the air slightly by a few degrees. The result is a more agreeable climate in this bedrizzled area.
Practical knowledge concerning cooling techniques
Using air coolers for cooling is an entirely natural and cost-effective method not requiring the same vast amount of energy an air conditioning system spends on this process.
But on no account does an air cooler equal an air conditioner that generates cold air regardless of ambient temperature and humidity. An air conditioner produces dehumidified, in other words dry cold air. Making use of the principle of evaporation cooling an air cooler on the other hand generates cold, but humid air. Depending on the humidity and temperature level air coolers can cool down the exhaust air by a few degrees Celsius – regardless of model or design.
Air coolers are better suited for use in small rooms with a dry climate, since the level of efficiency cannot be increased as easily as that of compressor-operated air conditioning systems. Moreover, every user should be aware that air coolers simply cannot cool down a room from 30 °C to 23 °C.
Air coolers operate most effectively in rooms filled with dry air and can only cause a temperature drop to the point of saturation. The devices operate by way of direct cooling, i.e. they directly supply the air with moisture. This means that for process-related reasons the humidity level in the room is increased perceptibly, which is an effect not necessarily desired. During the wintertime an increase of the humidity level is absolutely desirable due to the dry air in heated rooms. Therefore air coolers can be used all year round: as evaporation air cooler in the summer, as humidifier in the winter.
A great advantage of air coolers is their lack of an exhaust air hose for hot air discharge as all mobile air conditioning systems have. There is no need for hose installations through windows, doors or walls. That renders the air coolers extremely flexible and easy-to-handle, since you only have to set them up and switch them on – irrespective of the whereabouts.