Evaporative Cooling

The most efficient and environmentally friendly temperature relief for commercial and industrial environments

Find out how much you can save with on your site with our Evaporative Cooling vs. Air Conditioning Cost Comparison Calculator.

Our evaporative cooling solutions

Of all the climate control systems available, evaporative air cooling provides the most energy efficient temperature relief for commercial or industrial environments of any scale.

Up to 80% more economical than conventional air conditioning systems, our award-winning evaporative cooling systems have delivered proven cost reductions and operational returns throughout the manufacturing, food and beverage, IT, retail, health and education industries.



Here at Cosaf, we’re not only world leaders in clean, green heating, ventilation and air conditioning technology, but also the pioneers and unrivalled experts in the design and installation of evaporative cooling solutions in the UK.

Each one of our solutions is designed to meet your unique needs, whatever those might be.

  • Low cost and simple solution: Direct evaporative cooling

    This is the simplest form of evaporative air conditioning. This system tends to use a fan to draw hot air from the outside environment that is then passed through a wetted medium. Direct evaporative cooling adds moisture to the air stream close to saturation. Find out more

  • No moisture: Indirect evaporative cooling

    Indirect evaporative cooling takes water that has undergone the direct evaporative cooling process and pumps it through a water coil. When the supply of air is passed through the coil, the coil gets cooler and the air then has indirect contact with the cooled water. Indirect evaporative cooling does not add moisture to the primary air stream making it ideal for highly specialist manufacturing and production facilities. Find out more

  • Ultimate efficiency and no moisture: Hybrid Air₂O air conditioning system

    The world’s leading next-generation hybrid air conditioning system, utilising a unique combination of direct and indirect evaporative cooling – an IDEC technology with a +9 COP and +30 EER – to achieve 80% energy saving over Dx compressor-based systems. Find out more

  • Mobility and flexibility: Evapolar mobile evaporative cooling units

    A mobile personal evaporative cooling unit for the office, home or on the move. Not just another evaporative cooler, we made Evapolar so compact and powerful that you can put it on your table and reduce temperatures between 4-17℃. Find out more

 Book a free professional site survey now to determine your unique environmental  needs.


How much will evaporative cooling cost and how much will I save?

In reality evaporative cooling

In reality evaporative cooling could:

  • Cost you up to 50% less than traditional air conditioning systems, due to the simplistic design of the technology

  • Deliver up to 80% lower energy usage; and

  • Save you huge amounts of money in terms of maintenance, as this can be done in-house by your team following training.

However, don’t take our word for it. Calculate how much you could save by implementing an evaporative cooling system on your site with our quick and easy to use Evaporative Cooling Cost Comparison Calculator.


Why choose Cosaf?

As the world’s leading experts in the design and installation of evaporative cooling systems, when choosing us you will be choosing to work with a partner that:

  • Is a pioneer in the industry

  • Works with the world’s leading brands

  • Is an expert in providing solutions that will improve operations throughout your facility, not in only one specific area

  • Understands the risks involved in your sector and has the knowledge to advise on the most efficient solutions

  • Understands the importance of minimising downtime and always works with minimum disruption to your business operations

  • Is fully accredited and always aims to stay at the forefront of legislation and technological innovation.

Contact one of our evaporative cooling engineers to find out more about what we  can do for you.


Our credentials

Here at Cosaf, we are the leading experts in the design, installation and continued development of evaporative cooling technology in the UK. Browse through some of the many clients that we have implemented our solutions for below.

  • Amia Foods – With heat generated from their machines causing temperature to raise over 28℃, Amia Foods were looking for an energy-efficient solution that wouldn’t introduce any contaminants to their environment. Evaporative cooling met all their needs and proved to be the perfect solution, while significantly reducing their energy consumption costs. Read full case study here.

  • DHL – Global logistics firm DHL required an expert HVAC service to enable them to store and maintain crucial pharmaceutical products across their distribution network. We delivered an unprecedented 85% saving on the cost of the nearest competitive quote, all thanks to our evaporative cooling technology. Read full case study here.

  • Stockport College – Stockport College required a highly efficient ventilation system to service its vast space all year round. We installed evaporative cooling technology, consuming up to 90% less energy than traditional refrigerant units. Read full case study here.

  • Patak’s Foods – Having already established the effectiveness of our evaporative cooling systems in reducing high temperatures in its frying and packaging areas, Patak’s Foods had no hesitation in implementing our environmentally friendly coolers in their bottling hall as well. The installation of 12 evaporative coolers enabled the company to provide employees with improved and comfortable working conditions, while at the same time saving money and protecting the environment. Read full case study here.

  • Pegler – In an effort to provide better working conditions and increase productivity, Pegler were investigating various cooling options for their facilities. It wasn’t until they came across our evaporative cooling solutions that they felt they had found the right technology to help them meet their needs. Read full case study here.

Not sure if evaporative cooling is right for you? Let’s learn more about it…

What is evaporative cooling?

Evaporative cooling (EC)

Evaporative cooling (EC) is to date the most energy efficient and environmentally friendly climate control system used for temperature regulation within commercial and industrial environments.

EC is a process which occurs naturally whenever water comes into contact with warm air. Unlike air conditioning systems that use re-circulated air, evaporative cooling systems circulate fresh air through a building and force out the stale hot air. The fresh air from the outside is cooled by passing it over water and is then directed around the building by a fan.

Click here to find out more about what is evaporative cooling.

How does evaporative cooling work?

Evaporative air cooling uses evaporation to cool the air. The evaporative cooler, also known as a swamp cooler, consists of three main components: a pump, cooling pad and a fan.

The way the process works is quite simple. Within the evaporative cooler there is a pump which circulates water from the reservoir onto a cooling pad. The pad in turn becomes wet. Within the cooler there is also a fan, which draws air from the outside environment, going through the moistened pad. As the air passes through the pad, the air is cooled by evaporation.

To find out exactly how the evaporative cooling process works, have a look at our blog here.

Can I use evaporative cooling in the UK?

Contrary to common belief, the UK actually offers the perfect climate conditions for the use of evaporative cooling – which has now become one of the most rapidly expanding sectors within the commercial and industrial air cooling market in the country.

Evaporative cooling can produce air consistently below 22℃ in the UK climate, consuming only a fraction of the electricity that traditional air conditioning mediums would require. To find out more about the reasons why evaporative cooling is the perfect solution for temperature control, have a look at our blog here.

What are the benefits of evaporative cooling?

Evaporative cooling is being rapidly adopted in the UK as an alternative to conventional air conditioning systems and for good reason. The method presents a number of benefits over traditional AC systems. These include:

  • Better energy efficiency – you could be looking at saving anything up to 80% of your energy costs

  • Introduces 100% fresh air – reducing the risk of poor indoor quality and air pollution

  • Allows for open doors and windows

  • Lower initial and ongoing costs – up to 50% less to purchase and capable of cutting maintenance and repair costs by more than half

  • Environmentally friendly – bringing carbon emissions to zero

Find out about the benefits of evaporative cooling in more detail here.

Which industry sectors is evaporative cooling most suitable for?

Evaporative cooling can be implemented as a standalone solution or alongside your current air conditioning system in virtually any industry sector. Some classic applications of evaporative cooling include:

  • Warehouse and Factory Cooling – Cosaf are the most experienced contractor in the UK when it comes to addressing the cooling challenges of large factory and warehouse areas across the industry. Unprecedented energy savings can and have been achieved for our previous clients within this sector, with cooling being provided at a fraction of air conditioning costs. Find out more.

  • Data centres – As leading experts in the design and installation of Information Technology Evaporative Cooling systems for the data sector, we can deliver the most energy efficient and environmentally friendly solution for your specific needs. Find out more.

  • Education and Leisure Cooling – With the ability to accommodate spaces of any kind while at the same time having windows and doors opened, evaporative cooling allows a flexible working environment for both students and guests. Find out more.

  • Office solutions – With evaporative cooling, offices can now not only save massively on energy consumption, but also deliver multiple benefits to staff and address crucial environmental policies – a huge incentive for any commercial premises. Find out more.

  • Retail solutions – Modern construction practices within the retail sector, aimed to reduce heating costs, also lead to a higher cooling demand. Here, evaporative cooling can provide the perfect solution of comfort cooling while introducing 100% fresh air at your facilities, ensuring the comfort of your staff and customers while at the same time reducing up to 80% of your energy costs. Find out more.

Still not sure if evaporative cooling is right for you?

There’s no better way to find out whether evaporative cooling is right for your facilities and specific circumstances than having a full site survey completed by one of our EC experts.

All our site surveys are free of charge and with no strings attached. When on site we will not only identify what are the opportunities for the use of an evaporative cooling system, but also analyse your overall air cooling and heating performance and provide you with guidance and expert advice on how to improve efficiency, increase production and reduce both energy costs and carbon footprint.

Click here to book your free site survey today.


Evaporative Cooling Case Studies

Find out who we have worked with recently to provide world leading energy efficient cooling solutions that are changing the world we all operate in for the better.

View Case Studies