What Is an Evaporative Cooler and How Does It Work?

Tired of spending too much on your AC and looking for a better alternative to keep yourself cool? 

Evaporative coolers, AKA swamp coolers, are the best shot you’ve got today. They use water and air to reduce the heat without any refrigerants and compressors like HFC or CFC. When you consider the cost benefits, evaporative coolers can reduce your electricity bills by up to 80%. 

Do you want to know more about swamp coolers, how they work, or why they are better than AC? Just stay with us till the end.

The Purpose of Evaporative Coolers

Evaporative coolers are a sustainable way to reduce the temperature in homes, commercial buildings, and industrial spaces. It is an innovative method that implements the technique of water evaporation to lower the heat by up to 5 to 15 degrees Celsius in any condition.

It is not a simple air cooling system but a technology. Behind every piece of evaporative cooler lies the smart ideologies of energy efficiency, sustainability, and cost-effectiveness. They can pull the hot air around you to pass through the water-saturated pads and release cool air out.

Let’s check how advantageous it is to use an evaporative cooler.

  • Maintains a normal level of temperature in your home
  • Increases the productivity of your employees
  • Reduce burnout caused by staying in hot areas.
  • Avoids dehydration and keeps you and your indoor plants healthy
  • Creates a safer environment for people with allergies

Whatever your reasons for buying evaporative coolers are, you’ll benefit in many ways for sure.
Note: Unlike air conditioners, you can keep your windows and doors open when you are using evaporative coolers.

 

Is It Different from Traditional Air Conditioners?

Why should I buy an evaporative cooler when there are plenty of options available in traditional air conditioners? We all may have had this question in our minds. Let’s break it down for you.

Evaporation coolers and air conditioners are used for the same purpose. To bring down the heat to something that you can tolerate. But the difference comes in how they operate and how much benefit they offer. Let’s compare them to understand them better.

Feature Evaporative Cooler Air Conditioner
Energy Usage Low (about 60-80% less) High
Installation Cost Low to Medium Medium to High
Ideal Climate Hot and Dry Any (better in humid too)
Maintenance Simple (pads & water) Requires servicing
Cooling Method Water Evaporation Refrigerant & Compressor
Adds Humidity? Yes No (often reduces it)

Evaporative coolers do not use chemicals like refrigerants and compressors to keep the air cool. Neither do they recirculate damp indoor air. 

 

Do Evaporative Coolers Really Work?

Evaporative coolers work wonders in arid regions like the Middle East, Africa, Australia, etc., and sometimes outperform traditional air conditioners in terms of cost and efficiency. They reduce the indoor temperature from 5 to 15 degrees Celsius by consuming 75% less energy.

When the heat becomes very high, the AC consumes more power, which is totally against the principle of sustainability. But evaporative coolers use the same amount of energy all the time and offer better cooling with no extra charges.

Evaporative coolers are ideal for:

  • Desert climates and dry inland areas
  • Workshops, warehouses, and garages with open ventilation
  • Outdoor patios, greenhouses, and open-plan industrial spaces
  • Off-grid homes and areas with limited power supply

Unique Perk: In dry environments, they help prevent skin dryness, sore throats, and even static electricity.

 

Are Evaporative Coolers Healthy?

Have you noticed something triggering your allergic reaction while you’re sitting in the AC? Then you’re not alone. Air conditioners need to be serviced at the right time. Otherwise, your AC will be home to bacteria.

Evaporative coolers are a better choice over traditional air conditioners for people with allergies and respiratory issues. It is because they do not use harmful chemicals for cooling and don’t recirculate air. Since they are small in size and easy to clean, there’s no way dust builds up or bacteria grow there.

  • Works on water and air flow
  • Reduces excess indoor humidity
  • Uses 100% fresh air and does not reuse it
  • A very simple cleaning process to maintain the quality
  •  

How Does an Evaporative Cooler Work? Step-by-Step

What an evaporative cooler offers is interesting. Are you curious about what’s happening inside an evaporative cooler? Let’s try to understand the mechanism of it.

 

 

1. Pulling in Warm Air

The cooler pulls in hot air from outside using a fan. This air is usually dry, which helps the cooling work better.

2. Water Gets the Pads Wet

The cooler has thick pads in it that get soaked with water from a small built-in water pump. These pads need to stay wet for the system to cool the air properly.

3. Cooling Through Evaporation

As the hot air passes through the wet pads, the water starts to evaporate (turn into vapor). This process takes away heat from the air and makes it cooler.

4. Blowing Cool Air Indoors

Now the air feels cooler and a bit more moist. The fan blows this cooled air into your room to create a fresh breeze in the area.

5. Old Warm Air Gets Pushed Out

To keep the air fresh, you need to keep a window or door open. This lets the warm air inside your room escape while the cooler air comes in.
Note: The pads in the cooler can trap dust and pollen, so you get much cleaner air.

 

Why Choose a Reputable Evaporative Cooler Supplier?

When purchasing evaporative coolers, you have to be mindful of the supplier you go for. Because the supplier plays a key role in the system’s long-term performance, reliability, and even your day-to-day satisfaction.

 

Benefits of Choosing a Reliable Partner

  • Certified and tested equipment, compliant with safety and energy regulations
  • Made with high-grade materials that last longer in demanding conditions
  • Provides the right capacity based on the space, layout, and climate
  • Custom recommendations for home, commercial, or industrial settings
  • Proper air ventilation with correct electricity connections
  • Fewer chances of performance issues or water leakage
  • Offers maintenance guidance and spare part availability
  • Has a responsive support team for quick issue resolution
  • Long-term warranties and repairs if needed
  • Educates the users and large commercial or industrial clients
  •  

A reputed evaporative cooler supplier will also share tips to save water, auto-refill options, and ways to make your system more eco-efficient without compromising comfort.

Key Points Covered

  • Evaporative coolers are the modern and sustainable solution for indoor cooling.
  • They work on up to 75% less energy compared to air conditioners.
  • Swamp coolers can reduce your electricity bills substantially.
  • They have a built-in water pump, string pads, and a fan to pull in hot air and release cool air.
  • A certified cooler supplier provides you with more than the equipment itself.
  •  

 

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Picture of Sandeep Nair

Sandeep Nair

Sandeep Nair is the Co-founder and CEO of Venttup, with over 15 years of experience in project management, strategic sourcing, and supply chain digitalization. He has worked extensively in the energy sector, leading procurement programs, localization efforts, and vendor development strategies. His expertise lies in simplifying manufacturing workflows and strengthening supply chain operations through an integration of technology and practical industry knowledge. At Venttup, Sandeep leads the vision of making manufacturing more agile, efficient, and environmentally responsible. He focuses on helping global businesses work more effectively with Indian manufacturing networks through a structured and transparent approach. His composes real-world experience in sustainable manufacturing, digital transformation, and building reliable supplier ecosystems.
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Bangalore, Karnataka 560049, India

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