Project data
Authors Matthew Urquhart
Status Verified
Verified by Queen's University Green IT Group
Uses saving energy
Instance of Green IT
Download Open Know How Manifest
Page data
Part of MECH425 Engineering for Sustainable Development
Mech425 GreenIT Project
Queens Green IT ECMs
Type Project
Keywords energy saving, Green IT, Energy conservation measures, Energy audit, Energy efficiency, Finance, printer, energy-efficient, Engineering
SDG Sustainable Development Goals SDG07 Affordable and clean energy
Authors Matthew Urquhart
Published 2010
License CC-BY-SA-4.0
Affiliations Queen's University
Impact Number of views to this page. Views by admins and bots are not counted. Multiple views during the same session are counted as one. 365
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There is significant variability in the technical capabilities of many electronic devices, such as printers. Please note that this analysis is not constructed for determine which device meets your organization's technical requirements (i.e. duplex-printing, integrated fax/scan capabilities, etc.). However, after narrowing down your selection to a list of devices that meet the technical requirements of your organization, the decision of purchasing one device over another should also be influenced by the energy usage of each device in its various states of operation. This type of analysis evaluates a portion of the operating expense of the device by allowing you to explore the savings from replacing your printer(s) at the end of their useful life with more energy-efficient printer(s).

ECM Inputs[edit | edit source]

  • Energy costs (on- and off-peak), with a price inflation factor (can be set to 0%)
  • Grid emissions (CO2, NOx and SOx)
  • Number of printers to be replaced in the office
  • Any incentives offered by government or manufacturer to encourage purchase of energy-efficient models
  • Information about operation profile (active hours per business day, number of business days per year)
  • Data for replacement printers (initial cost, active and stand-by power consumption, packaging waste and ink consumption as available)

ECM Assumptions[edit | edit source]

  • Printers are not unplugged or turned off, but left in power-save (stand-by) mode outside of working hours on weekdays and turned off for weekends. Note that some devices may continue to draws power when powered 'off' but plugged in. To reduce this 'phantom power', please consult the smart strip power bar ECM homepage.
  • Flat-rate incentives may be offered by either government or manufacturers of equipment to encourage purchase of energy-efficient models.
  • Risk-free rate of return calculated from Treasury Bill notes, issued by the Canadian government.

Download this calculator[edit | edit source]

The most recent version of this calculator, as confirmed by the Queen's Green IT Group (original constructors of the document), is available here:

See also[edit | edit source]

For more information, check the Queen's Green IT ECM homepage.

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