HP's UK branch has released a short online publication called “The HP Guide for Greener Printing” available here online.
Most of the advice is pretty obvious, with encouragement to print in duplex, send more documents electronically, and recycle paper.
On interesting point is made, however, about the effect of letting printers and copiers run when not in use. “All office equipment uses energy when switched on or in stand-by mode. In the UK alone, equipment left on standby is responsible for generating over 3 million tonnes of CO2 each year, according to the Energy Saving Trust.”
Of course, many copiers and some printers have sleep modes that are automatically triggered if left idle for a preset period (generally somewhere between five and 60 minutes) , or can be set to go off ready automatically during non-working hours. That’s part of the new EnergyStar criteria for newer machines, and many companies are complying. But many older desktop machines in particular do not offer any sleep feature. Having employees shut down desktop printers and MFPs at the end of the day may be a smart idea.