Frequently Asked Questions

Can you catch Legionnaires disease from an Evaporative Cooler?

• No. Circulating water is less than 2°C and no droplets are allowed to form and pass into the building.

Has anyone ever caught Legionnaires disease from an Evaporative Cooler?

• There have never been any cases of Legionnaires disease attributed to a wetted media cooler. There are believed to be over 30 million installations world-wide.

How much will Evaporative Cooling reduce the temperature by?

• Depending on ambient temperature, an evaporative cooler unit on a hot day in the UK would keep the temperature at or below 22°C. In hot climates maximum temperature is unlikely to exceed 24°C.

Is water-reused?

• Yes. Water can be re-circulated until evaporation has concentrated the salts to scaling-point (whereupon the water is replaced) and or until the cooling is turned off and the cooler then automatically drains.

How much water and electricity does an Evaporative Cooler Use?

• Approximately 20W of Electricity to run and 0.7L of water per kilowatt of cooling required.

How much would it cost to run?

• 25kW of cooling would cost 6p per hour of electricity and 1p of water per hour in the UK.

How much maintenance is required?

• You are recommended to clean the unit every 6 months.

How long do the pads last?

• Pads can last up to 5 years (depending on local air quality).

Do the pads clean the air, too?

• Yes, a pas will filter-out larger particules such as dust or pollen. Insect screens are also fitted as standard.

Will I get condensation?

• No, provided the design is based on a balanced ventilation scheme with appropriate controls.

Will people feel uncomfortable with the water added to the air?

• No. Studies show people are comfortable with higher relative humidity where the temperature is below 25°C. A correctly designed Evaporative cooling system will keep temperatures well under this figure.