In the UK, the temperature outside is usually less than the temperature inside!

The ‘Free Cooling’ available from the lower outside air temperature is often not utilised.

Most control systems will require chillers to be on, even when the outside temperature is nearing zero, in order to combat the internal heat gains.

It is not realistic to open the windows or pump cold air direct into the office on cold days as this is not comfortable.

However, plant systems often have the ability to make best of ‘Free Cooling’ available from cold outside air through the chillers, AC units or air handling unit. Maximising the use of these can provide significant savings.