Evaporative Cooling Originated in an Ancient Idea


People who live in hot areas always find out various ways to cool down the temperature when summer’s coming. Evaporative cooling, as one of them, ancient people used this idea to cool the room by pouring water on the reed and putting it up as a curtain. When hot air went through the curtain, the temperature went down.

Nowadays, with the instant technology innovation, the Evaporative cooling pad has replaced the reed and wood wool as the cooling media, to maximize the evaporation area and increase the cooling efficiency.



Evaporative Air Cooler, as the modern industrialized product based on this ancient theory, brings this benefit to every aspect of our life.

The pump circulates water from the water tank onto a cooling pad, which in turn becomes very wet. A fan draws hot air from the outside of the unit through the moistened pad. As it passes through the pad the air is cooled by evaporation, and then is pressured out by a ventilator.

An Evaporative air cooler can be installed on the roof, wall, or ground, wherever suitable.

When cooled air is blowing into the building constantly by the evaporative air cooler, the hot air inside the building is forced out. And the pressure difference between the inside and outside of the building will lead to continuous air exchange, so a certain quantity of doors and windows shall be kept open to facilitate the air exchange during air cooler operation.

Since plants and animals are very sensitive to changes in temperature and humidity, heat stress has a huge impact on growth and development in agricultural and farming applications.

The evaporative cooling pad system, as one of the most efficient and economical cooling ways for agricultural and breeding applications, provides an ideal temperature and a comfortable environment during the hot summer.

The ventilation fan and cooling pad frame shall be installed on a different wall side to ensure fluent airflow.

The air is exhausted out during the ventilation fan’s operation, which creates a negative pressure inside of the building, then air from the cooling pad frame side will flow into the building to keep the pressure balance. When air passes through the cooling pad which is filled with water, the temperature of the airdrops is due to evaporation in the process.



Around 2000 years ago, ancient Egyptians poured water on the reed and put it up as a curtain to cool the room.

In the early 20 century, people use wood wool to replace reed to cool.

In the 1950s, an evaporative cooling pad called “Celdek” was invented by the Swedish inventor Munters, which was widely used all over the world as the most natural cooling way.

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