- Project plans
- Project activities
- Legislation and standards
- Industry context
Last edited 26 Sep 2017
Everything you need to know about evaporative cooling
Evaporative cooling units work by recreating the earth’s natural cooling process and providing a constant flow of cool air. This method of cooling the air has been used for centuries, as it’s a more efficient, effective, and environmentally friendly solution. These units can be used for both commercial and industrial buildings, as these areas often require the frequent opening of doors.
 How does evaporative cooling work?
Evaporative cooling units use evaporation in order to cool the air; hot air from the outside is pumped in through water-soaked pads and, as air is blown over them, the water evaporates and any heat in the air is absorbed. This process lowers the air temperature, as a fan pushes the cooled air through a ducting system.
 Differences between evaporative cooling and air conditioning
Although serving the same cooling purpose, evaporative cooling units and air conditioning units are very different. With evaporative cooling, having air circulating into the space is beneficial in order to introduce fresh air into the environment and to reduce the possibility of poor indoor air quality.
Air conditioning units, however, remove the humidity from the air and produce dry, cold air. These units function at their best in completely air tight spaces, becoming more inefficient when air comes into the room from the outside.
 Environmental benefits
As it mimics the earth’s natural cooling process, evaporative cooling is more beneficial for the environment. The air is cooled by water instead of through the use of refrigerants, and there is less use of electricity. Evaporative cooling uses approximately less 90% of the total amount of electricity that air conditioning units require.
The use of electricity can impact the environment tremendously, and controlling the environment inside buildings can use up a lot of electricity. To decrease the use of electricity and protect the environment, evaporative cooling units are a solution.
 Benefits of evaporative cooling
Evaporative cooling provides many benefits, such as:
 Low CO2 emissions
 Inexpensive solution
--Heritage Heating and Cooling 13:41, 21 Aug 2017 (BST)
 Find out more
 Related articles on Designing Buildings Wiki
Featured articles and news
The structural feasibility of modular high-rise buildings.
BRE conference on ways of providing and maintaining quality indoor environments.
CDBB publish foundational definitions and values to guide the development of the National Digital Twin.
Despite the reduction in staffing, most users remain satisfied with the service.
We run through the top 37 styles in history - but how many would you recognise?
Improving approaches to risk in the built environment sector.
Megatrends: Smart Building Technology
Share your BREEAM knowledge to help improve the industry.
Are you innovating without realising it?
Is timber a carbon source rather than a carbon sink?