IEC TR 62921:2016 Factsheet

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IEC TR 62921:2016 : Quantification methodology for greenhouse gas emissions for computers and monitors
Name of Initiative/Methodology

Quantification methodology for greenhouse gas emissions for computers and monitors

Link to the latest published version

IEC TR 62921 (10/2016): Version 2.0

Developed by

International Electrotechnical Commissions (IEC), Technical Committee 111: Environmental Standardisation for Electrical and Electronic Products and Systems
History and Status
  • Work started in 2011 and first publication in 2015
  • Updated version published in October 2016
Involved companies / parties
  • Not known

Organisation env. accounting

 Scope 1  
 Scope 2  
 Scope 3

Product env. assessment 

 Life cycle approach  

 Use phase only


 Energy (focus on secondary energy)

 Other environmental impacts


System(s) covered by the methodology
  • Computers and monitors (incl. notebook, desktop, LCD monitor, etc.)
  • Providing supporting data for identification of a life cycle stage, subassembly or process that have significant GHG emissions (hot spot)
  • Assessing carbon footprint of computers and monitors
  • Prioritising reduction efforts across the product life cycle
  • Creating a basis for quantifying and reporting CFP performance over time.
Generic features
  • Targeted data collection is performed based on an analysis of the biggest contributors to impacts and to results’ uncertainty. This analysis may also be used to determine the appropriate cut-off criteria.
  • Allocation should be avoided; if proven necessary, several methods can be used and are detailed in the document.
  • Uncertainty analysis and sensitivity analysis are to be performed
  • First party verification is recommended for communication
  • An informative list of life cycle database (public database) is provided in Annex C.
ICT-specific features
  • Primary data or aggregated primary data should be used for LCDs, PWBs and ICs. Secondary data should be used for all other data needs.
  • When assessing GHG emissions of EE products, the following should be considered:
    • The organisation should use primary data from its suppliers
    • All packaging materials should be considered.
    • Distribution stage should include transportation processes
    • The use phase should be estimated under realistic conditions of use (i.e. use profile based on actual usage patterns, power consumption of the different modes, etc.)
    • End of life should cover impacts generated from transport to the recycling facility, recycling or landfilling of the materials
    • Maintenance, refurbishment and second use are excluded.
  • Communication may not necessarily detail results for each life cycle stage.
  • Recommended sources for product energy consumption are provided in Annex.
Examples of implementation / experience feedback

None identified

Interaction with other methodologies
  • [IEC TR 62725] Analysis of quantification methodologies of greenhouse gas emissions for electrical and electronic products and systems
  • [IEC 62430] Environmentally conscious design for electrical and electronic products
  • [IEC 62474] Material declaration for products of and for the electrotechnical industry
  • [IEC 62623] Desktop and notebook computers - Measurement of energy consumption
  • [IEC TR 62635] Guidelines for end-of-life information provided by manufacturers and recyclers and for recyclability rate calculation of electrical and electronic equipment
  • [ISO 14040] Environmental management - Life cycle assessment - Principles and framework
  • [ISO 14044] Environmental management - Life cycle assessment – Requirements and guidelines
  • [ISO 14064-1] Greenhouse gases - Specification with guidance at the organization level for quantification and reporting of greenhouse gas emissions and removals
  • [ISO/TS 14067] Greenhouse gases -- Carbon footprint of products -- Requirements and guidelines for quantification and communication
  • [GHG Protocol] Product Life Cycle Accounting and Reporting Standard
  • [ETSI TS 103 199] Environmental Engineering (EE); Life Cycle Assessment (LCA) of ICT equipment, networks and services; General methodology and common requirements
  • [ITU-T L.1410] Methodology for environmental life cycle assessments of information and communication technology goods, networks and services

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