How Does An Evaporative Cooler Work?

An evaporative cooler, also known as a swamp cooler, is a type of cooling system that uses the natural process of evaporation to lower the temperature of the air. 

The best evaporative coolers can prove helpful in summers.

The working of an evaporative cooler is simple. Here’s a step-by-step guide on how an evaporative cooler works:

Step 1

The evaporative cooler pulls in hot, dry air outside through a vent or window.

Step 2

The air is then passed through a wet cooling pad or media, kept moist by a water pump or gravity-fed water distribution system.

Step 3

As the hot, dry air passes through the wet cooling pad, the water on the pad evaporates and absorbs heat from the air, causing the air to cool down.

Step 4

The now-cooled air is then circulated into the room by a fan.

Step 5

The process repeats itself as the cooler pulls in hot, dry air from outside and passes it through the cooling pad.

how does an evaporative cooler work infographic

What are the important considerations while using an evaporative cooler?

Here are some important considerations to keep in mind when using an evaporative cooler:


Evaporative coolers work best in hot, dry climates with low humidity. In humid areas, the cooling effect will be less effective.

Room Size:

The size of the room that you want to cool should be considered. It is important to choose an evaporative cooler with the right cooling capacity for the size of the room. If the cooler is too small for the room, it may not be able to cool the air effectively.

Water Quality:

Evaporative coolers require a regular supply of clean water to work effectively. It is important to use clean water to prevent the growth of bacteria or algae, which can clog the cooling pads and affect the air quality.


Regular maintenance is necessary to keep the cooler working efficiently. This includes cleaning the cooling pads, checking the water supply, and replacing them when worn out.


Proper airflow is important for effective cooling. It is important to ensure that the cooler is positioned in an area with good airflow and that the windows and doors are open to allow for the circulation of fresh air.


Some evaporative coolers can be noisy, so it is important to choose a model with a noise level that is comfortable for you.


Evaporative coolers are generally less expensive to purchase and operate than traditional air conditioners, but it is important to consider the initial cost and ongoing maintenance costs when choosing a model.


An evaporative cooler is a simple and energy-efficient cooling system that works by using the natural process of evaporation to cool the air.

By pulling hot, dry air through a wet cooling pad, the water on the pad evaporates and absorbs heat from the air, causing it to cool down. A fan circulates this cooled air into the room, creating a refreshing and comfortable environment.

When considering using an evaporative cooler, it is important to keep in mind factors such as climate, room size, water quality, maintenance, airflow, noise, and cost.

With proper care and maintenance, an evaporative cooler can provide an effective and eco-friendly solution for cooling your home or office.

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