IT Services have been measuring the number of devices active on our network, and on the night of 15th February 2007 just over 2400 machines on campus were left on.

Some of these will have been left on for good reasons - processing jobs, scientific work overnight etc - but it seems likely that a proportion could have been switched off.

• If  2000 of these machines could be switched off at night this would represent a saving to the University of about 1000 Kilowatt-Hours (KWH), each night. 
• This would be a saving of  300,000 kWh per year.
• Average consumption is approximately between  3,000-5000 kWh  per year depending on house size, number of occupants etc).