Evaporative Cooling

Evaporative Cooling is the most natural, cost effective and environmentally friendly way to cool a building; introducing 100% fresh air to keep the temperatures down. 

Unlike the more traditional refrigerant air conditioning systems that uses re-circulated air, evaporative cooling systems circulate cool fresh air through a building and force out the hot stale air.

Designed to deliver the perfect ventilation and cooling solution for large industrial and commercial spaces such as Factories, Warehouses, IT Data centres, Food Manufacturing, Leisure Facilities, Hospitals and Large Retail Space and many more ….

Benefits of Evaporative Cooling

  • Introduces fresh outside air to cool the building
  • Extraction of stale air to keep the air clean and free of harmful bacteria and viruses
  • Removes the need for harmful refrigerant gases therefore making it an environmentally friendly cooling solution.
  • Low total cost of ownership solution with lower running costs and energy consumption
  • Non-recycled air
  • Low maintenance throughout the year
  • Effective even when doors, windows and roller shutters are open
  • Happy, Healthier and a more Productive work force

Find the Perfect Cooling and Ventilation Solution for your Workplace

Evaporative Cooling is an extremely popular and cost effective alternative to the more traditional refrigeration air conditioning systems. Offering potential savings of up to 90% in running costs and uses only 10% of the energy.

Evaporative Cooling - The Natural Way To Cool Your Premises

By building on this natural occurrence by installing air coolers into ventilation systems to naturally cool the air. Fans draw a constant flow of fresh outside air over saturated cooler pads to produce the evaporative cooling effect.

As the water evaporates, energy is lost from the air causing a reduction in the outgoing temperature, many describe this as the same feeling that you get whilst at the seaside when a sea breeze passes over the ocean.

 The fresh, cool air is then introduced into the building to cool it and the hot exhaust air is removed through open doors and windows and with the introduction of extraction fans to keep the building cool.

By using evaporative cooling as an integral part of a ventilation system means that the temperature of a building can be controlled even on the very hottest of days. In fact, the hotter the outside temperature and the lower the humidity, the greater the cooling effect

Please see the table below for the cooled temperature achievable at different ambient temperatures and humidities.

Maintain working temperatures under 25°C all year round ...


Relative Humidity

Relative HumidityRelative HumidityRelative Humidity


























Evaporative Cooling is a completely natural way of producing cool fresh air and can save you upto

0 %

on cooling costs.

Flexible Products and Installation Types ​

Contact OKEL to arrange your Free Site Survey

Evaporative Cooling and Ventilation Versus Refrigerated Air Conditioning

Typically uses less than 10% of the electricity than conventional air conditioning

Higher electrical demand due to the refrigerant circuit compressor

No refrigerants

Use of environmentally damaging refrigerants

Supplies 100% fresh cooled air

Uses mainly recycled air

Can accommodate the very hottest of days

Performance reduces at high ambient temperatures

Low carbon dioxide footprint

Higher carbon dioxide impact