He added that employees should consider turning off other electrical equipment when it is not in use.
"All the [messages about] equipment we see in offices are very similar to the messages we hear at home, which include not leaving the equipment on standby," he explained.
"Even if companies can't switch computers off for technical or security reasons, the employee can still switch the monitor off, which can have considerable savings."
Recent research by npower found that nearly two-thirds of business employees feel that their company is wasting energy.
It was also revealed that 25 per cent felt it was difficult to take action to be energy efficient at their workplaces.
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