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Embodied carbon in building services: A calculation methodology for North America provides detail of alternative assumptions to be made when using the CIBSE embodied carbon methodology to calculate the embodied carbon impact of building services equipment installed in Canada, the United States of America and Mexico, and is a collaboration between CIBSE and ASHRAE. This is not a standalone document, and cannot be applied without first understanding Embodied carbon in building services: A calculation methodology (TM65).
The creation of this document followed steps laid out in the companion publication Embodied carbon in building services: Using the TM65 methodology outside the UK (TM65LA).
The CIBSE embodied carbon methodology now includes several publications, digital tools, free-to-all data-gathering forms, training courses and webinars. All of these can be accessed from www.cibse.org/tm65.
1 Introduction
1.1 Context
1.2 The TM65 methodology in North America
1.2.1 How to use the TM65 methodology in North America
1.2.2 How TM65 relates to building certification programs
1.2.3 How TM65 relates to EPDs
1.2.4 How TM65 relates to PCRs
2 Local assumptions relevant to North America
2.1 Collecting and reporting data
2.1.1 ‘Basic’ calculation assumptions
2.1.2 ‘Mid-level’ calculation assumptions
3 Additional actions
3.1 Moving forward: Actions engineers can take
3.2 Considerations beyond carbon
Appendix A: Summary of Embodied carbon in building services: A calculation methodology (TM65)
Appendix B: Worked example – Basic calculation method
Appendix C: Worked example – Mid-level calculation method
Appendix D: Sensitivity analysis
Appendix E: US EPA eGRID subregion map
Appendix F: Creation of the local addendum for North America
Authors: Michael Deru (NREL) and Louise Hamot (Introba)
Contributors: Ghina Annan (Stantec), Eric Campbell (Stantec), Amy Costello (Armstrong World Industries), Kate Hickcox (PNNL), Dario Ibargüengoitia (AREI). Matt Jungclaus (University of Colorado), Luke Leung (SOM), Margaret Logan (Armstrong Fluid Technology), Bill McQuade (Baltimore Air Coil), Jennifer O’Connor (Athena SMI), Swathy Ramaswamy (Trane Technologies), Andrew Rhodes (Amazon), Shannon Sajdak (Trane Technologies), Amalia Sojo (EarthShift Global), Scott Unger (PNNL), Mike Waite (ACEEE), Mazin Zarrouq (Armstrong Fluid Technology)
Peer reviewers: Rowan Bell-Bentley (Arup), Sarah Bousquet (Arup), Joe Jack Williams (FCBStudios)
Peer reviewers: Luke Leung (SOM); Matt Jungclaus (University of Colorado Boulder); Nicole Sullivan (Thinkstep ANZ); Philip Johnson (Daikin Applied).
Revision history:
30th October 2024: redundant entries for Yukon, Northwest Territories and Nunavut were deleted from Table 2.9 on page 8.