Keep the windows closed to allow the air condition system to cool the air

[Infopoint]

You are invited not to open the windows in your office or in common 
places like the LB Coffee Bar.
With this warm weather, open windows will let warm air come in and 
increase the amount of air to be chilled by the
air condition system, reducing the impact of the system and increasing 
its running costs.

Thank you for your understanding.
Dag Harald Johannessen