Whole Life Carbon Conventions - Revision history

Editor at 20:03, 1 December 2025

2025-12-01T20:03:52Z

← Older revision		Revision as of 20:03, 1 December 2025
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−	"Whole Life Carbon Conventions for New Homes: Developed by the sector – comprising of developers, manufacturers and whole life carbon experts – the Future Homes Hub (FHH) Whole Life Carbon Conventions for New Homes aim to help businesses across the sector share and report whole life carbon assessments on a consistent basis.	+	"Whole Life Carbon Conventions for New Homes: Developed by the sector – comprising of developers, manufacturers and whole life carbon experts – the Future Homes Hub (FHH) Whole Life Carbon Conventions for New Homes aim to help businesses across the sector share and report whole life carbon assessments on a consistent basis."

−	The WLC conventions:	+	[https://www.futurehomes.org.uk/wlc-tool#WholeLifeCarbonConventionsforNewHomes https://www.futurehomes.org.uk/wlc-tool#WholeLifeCarbonConventionsforNewHomes] (see link and below for details)
		+
		+	"The WLC conventions:

	* Drive consistency of WLC assessment outputs by agreeing the assumptions and conventions relevant for new homes sector.		* Drive consistency of WLC assessment outputs by agreeing the assumptions and conventions relevant for new homes sector.
Line 8:		Line 10:
	The Conventions reference the same core methodology defined by EN 15978 and RICS PS 2023 and can be used with any commercial assessment tool.		The Conventions reference the same core methodology defined by EN 15978 and RICS PS 2023 and can be used with any commercial assessment tool.

−	* FHH WLC Conventions for New Homes V1.0 – May 2024	+	* [https://irp.cdn-website.com/bdbb2d99/files/uploaded/FHH_WLC_Conventions_for_New_Homes_v1_-_May_2024.pdf FHH WLC Conventions for New Homes V1.0 – May 2024]
−	* FHH WLC Conventions V2.0 APPENDIX A – Default Materials and Assumptions	+	* [https://irp.cdn-website.com/bdbb2d99/files/uploaded/FHH_WLC_Conventions_V2.0_-_APPENDIX_A_Default_Materials_and_Assumptions.xlsx FHH WLC Conventions V2.0 APPENDIX A – Default Materials and Assumptions]
−	* FHH WLC Conventions V1.0 APPENDIX B.1 – Dwelling Level Reporting Template	+	* [https://irp.cdn-website.com/bdbb2d99/files/uploaded/FHH_WLC_Conventions_v1_-_APPENDIX_B.1_Dwelling_Level_Reporting_Template_May_2024.xlsx FHH WLC Conventions V1.0 APPENDIX B.1 – Dwelling Level Reporting Template]
−	* FHH WLC Conventions V1.0 APPENDIX B.2 – Project Level Reporting Template	+	* [https://irp.cdn-website.com/bdbb2d99/files/uploaded/FHH_WLC_Conventions_v1_-_APPENDIX_B.2_Project_Level_Reporting_Template_May_2024.xlsx FHH WLC Conventions V1.0 APPENDIX B.2 – Project Level Reporting Template]
−	* FHH WLC Conventions V1.0 APPENDIX C – Component Benchmarks	+	* [https://irp.cdn-website.com/bdbb2d99/files/uploaded/FHH_WLC_Conventions_v1_-_APPENDIX_C_Component_Benchmarks.xlsx FHH WLC Conventions V1.0 APPENDIX C – Component Benchmarks]
−		+
−	~~Thank you to all of those who have contributed their time. See the Embodied and whole life carbon project page for the list of those involved.~~	+
−		+
−	Whole life carbon tool for homebuilders: The Future Homes Carbon Assessment Tool focus is to estimate whole life carbon in a way that is consistent, quick, low cost and straightforward enough to drive significant uptake across the new homes sector. It enables whole life carbon to be compared between different design options for individual dwellings and informs early-stage decision making. The first version of the tool uses only pre-defined example build-ups, and is not appropriate for detailed, later stage, analysis.	+
−		+
−	~~The Future Homes Carbon Assessment Tool:~~	+
−		+
−	* is aimed at developers, architects and designers.	+
−	* is available now via a dedicated site carboncalculator.org.uk – or runs as an add-in for Microsoft Excel.	+
−	* provides a simple to use, accessible, free of charge way for homebuilders to calculate embodied and whole life carbon – and quickly see the potential impact of different design options, construction systems or specification choices, particularly at early design stages.	+
−		+
−	~~Quick start guide: Open the Future Homes Carbon Assessment Tool in our dedicated site now – Click here to get started. That’s it!~~	+
−		+
−	~~Running the Future Homes Carbon Assessment Tool as an Add-in in Microsoft Excel: This 2-minute video explainer walks through the process of setting up the FHH WLC Tool in Excel (browser version).~~	+
−		+
−	IMPORTANT: To download the Add-In to your computer, you will need to right click the Button below and select: Save Linked File or Download Linked File or Save Link As (depending on your browser). The Add-In is an XML file.	+
−		+
−	~~RIGHT CLICK THIS BUTTON TO DOWNLOAD THE EXCEL ADD-IN~~	+
−		+
−	~~If you are having any issues downloading the file after viewing the video explainer then please reach out to the Future Homes Hub team.~~	+
−		+
−	~~FHH WLC Tool V2 User Guide – May 2025~~	+
−		+
−	~~FHH Carbon Assessment Tool_Material and Build-Up Entry v1.3~~	+
−		+
−	~~FHH WLC Tool V2 User Guide – APPENDIX A – FHH Pre-defined Build Ups~~	+
−		+
−	~~FHH WLC Tool V2.3 User Guide – APPENDIX B – Tool Inputs Required~~	+
−		+
−	~~Pre-calculators for regulated and unregulated energy demand~~	+
−		+
−	~~For those producing WLC assessments aligned with the Conventions for New Homes, two pre-calculator tools have been developed:~~	+
−		+
−	Regulated Energy: this helps to extract exactly the right information from a SAP 10.2 output sheet to calculate annual regulated energy consumption for gas and electricity based on location-specific weather data. (kWh/year)	+
−		+
−	~~WLC pre-calculator - Regulated energy from SAP outputs v1~~	+
−		+
−	Unregulated Energy: this calculates annual energy consumption from unregulated uses (cooking and appliances) according to the Conventions for New Homes. Not required if using Hub tool as this is built in.	+
−		+
−	~~WLC pre-calculator - Unregulated energy v1~~	+
−		+
−	~~Technical support~~	+
−		+
−	~~If you have any issues using the tool, please contact our technical team for support – email us.~~	+
−		+
−	~~Benchmarking the sector~~	+
−		+
−	~~The Hub is calling for all members to start measuring to the WLC Conventions and sharing a selection of their projects to enable us to benchmark the sector more accurately.~~	+
−		+
−	~~For more details about exactly which tools you can use, how to submit your data and how we will use and protect your data, please see our Benchmarking: Embodied and whole life carbon page.~~	+
−		+
−	~~Timeline and Next steps~~	+
−		+
−	~~For detailed information on our key milestones and next steps, see our Embodied and whole life carbon project page.~~	+
−		+
−	~~Disclaimer~~	+
−		+
−	The Future Homes Carbon Assessment Tool is provided 'as is', without warranty of any kind, express or implied, including but not limited to any warranties of merchantability, fitness for a particular purpose and non-infringement. In no event shall the authors or copyright holders be liable for any claim, damages or other liability, whether in an action of contract, tort or otherwise, arising from, out of or in connection with the tool or the use or other dealings in the tool.	+
−		+
−	~~Embodied carbon results are intended to provide a ‘guide’ for comparison purposes and should not be taken as a definitive value for the project.~~	+

−	~~The Future Homes Carbon Assessment Tool relies on users inputting project information, including high-level building geometry inputs and selecting pre-defined build-ups for one or more elements~~. ~~Pre-defined build-ups and associated material quantities within~~ the ~~tool are based on typical indicative build-ups~~ and ~~may not reflect~~ the ~~exact constructions and quantities used in your project~~.	+	Thank you to all of those who have contributed their time. See the Embodied and whole life carbon project page for the list of those involved."

−		+	= Related articles on Designing Buildings =

−	~~Users should therefore carefully consider~~ and ~~take responsibility~~ for ~~how they apply the tool~~	+	* Beyond the life-cycle carbon
		+	* Carbon dioxide equivalent
		+	* Carbon.
		+	* Carbon dioxide.
		+	* Carbon footprint.
		+	* Design life.
		+	* Embodied energy.
		+	* Energy consumption.
		+	* End of life carbon
		+	* Energy Performance of Buildings Directive.
		+	* Energy targets.
		+	* Introducing whole-life carbon metrics: Recommendations for highly efficient and climate-neutral buildings
		+	* Greenhouse gases.
		+	* Life Cycle Carbon Emissions
		+	* Net zero (whole life) carbon
		+	* RICS launches new global edition of its ground-breaking Whole Life Carbon Assessment standard
		+	* The sustainability of construction works.
		+	*
		+	* Whole life carbon
		+	* Whole life carbon assessment of timber
		+	* Whole Life Carbon Emissions
		+	* Whole Life Carbon Guidance for Offsite Construction
		+	* Whole life carbon regulations

−	[[Category:~~Articles_needing_more_work~~]]	+	[[Category:DCN_Commentary]] [[Category:DCN_Dataset]] [[Category:DCN_Definition]] [[Category:DCN_Project_Knowledge]] [[Category:DCN_Specification]] [[Category:DCN_Standard]] [[Category:Definitions]] [[Category:Publications_/_reports]] [[Category:Research_/_Innovation]] [[Category:Standards_/_measurements]] [[Category:Sustainability]] [[Category:Procurement]]

Editor: Created page with ""Whole Life Carbon Conventions for New Homes: Developed by the sector – comprising of developers, manufacturers and whole life carbon experts – the Future Homes Hub (FHH..."

2025-12-01T19:54:43Z

Created page with ""Whole Life Carbon Conventions for New Homes: Developed by the sector – comprising of developers, manufacturers and whole life carbon experts – the Future Homes Hub (FHH..."

New page

"Whole Life Carbon Conventions for New Homes: Developed by the sector – comprising of developers, manufacturers and whole life carbon experts – the Future Homes Hub (FHH) Whole Life Carbon Conventions for New Homes aim to help businesses across the sector share and report whole life carbon assessments on a consistent basis.

The WLC conventions:

* Drive consistency of WLC assessment outputs by agreeing the assumptions and conventions relevant for new homes sector.
* Help the sector move towards mainstream measurement and disclosure – building awareness and engaging the mass market.

The Conventions reference the same core methodology defined by EN 15978 and RICS PS 2023 and can be used with any commercial assessment tool.

* FHH WLC Conventions for New Homes V1.0 – May 2024
* FHH WLC Conventions V2.0 APPENDIX A – Default Materials and Assumptions
* FHH WLC Conventions V1.0 APPENDIX B.1 – Dwelling Level Reporting Template
* FHH WLC Conventions V1.0 APPENDIX B.2 – Project Level Reporting Template
* FHH WLC Conventions V1.0 APPENDIX C – Component Benchmarks

Thank you to all of those who have contributed their time. See the Embodied and whole life carbon project page for the list of those involved.

Whole life carbon tool for homebuilders: The Future Homes Carbon Assessment Tool focus is to estimate whole life carbon in a way that is consistent, quick, low cost and straightforward enough to drive significant uptake across the new homes sector. It enables whole life carbon to be compared between different design options for individual dwellings and informs early-stage decision making. The first version of the tool uses only pre-defined example build-ups, and is not appropriate for detailed, later stage, analysis.

The Future Homes Carbon Assessment Tool:

* is aimed at developers, architects and designers.
* is available now via a dedicated site carboncalculator.org.uk – or runs as an add-in for Microsoft Excel.
* provides a simple to use, accessible, free of charge way for homebuilders to calculate embodied and whole life carbon – and quickly see the potential impact of different design options, construction systems or specification choices, particularly at early design stages.

Quick start guide: Open the Future Homes Carbon Assessment Tool in our dedicated site now – Click here to get started. That’s it!

Running the Future Homes Carbon Assessment Tool as an Add-in in Microsoft Excel: This 2-minute video explainer walks through the process of setting up the FHH WLC Tool in Excel (browser version).

IMPORTANT: To download the Add-In to your computer, you will need to right click the Button below and select: Save Linked File or Download Linked File or Save Link As (depending on your browser). The Add-In is an XML file.

RIGHT CLICK THIS BUTTON TO DOWNLOAD THE EXCEL ADD-IN

If you are having any issues downloading the file after viewing the video explainer then please reach out to the Future Homes Hub team.

FHH WLC Tool V2 User Guide – May 2025

FHH Carbon Assessment Tool_Material and Build-Up Entry v1.3

FHH WLC Tool V2 User Guide – APPENDIX A – FHH Pre-defined Build Ups

FHH WLC Tool V2.3 User Guide – APPENDIX B – Tool Inputs Required

Pre-calculators for regulated and unregulated energy demand

For those producing WLC assessments aligned with the Conventions for New Homes, two pre-calculator tools have been developed:

Regulated Energy: this helps to extract exactly the right information from a SAP 10.2 output sheet to calculate annual regulated energy consumption for gas and electricity based on location-specific weather data. (kWh/year)

WLC pre-calculator - Regulated energy from SAP outputs v1

Unregulated Energy: this calculates annual energy consumption from unregulated uses (cooking and appliances) according to the Conventions for New Homes. Not required if using Hub tool as this is built in.

WLC pre-calculator - Unregulated energy v1

Technical support

If you have any issues using the tool, please contact our technical team for support – email us.

Benchmarking the sector

The Hub is calling for all members to start measuring to the WLC Conventions and sharing a selection of their projects to enable us to benchmark the sector more accurately.

For more details about exactly which tools you can use, how to submit your data and how we will use and protect your data, please see our Benchmarking: Embodied and whole life carbon page.

Timeline and Next steps

For detailed information on our key milestones and next steps, see our Embodied and whole life carbon project page.

Disclaimer

The Future Homes Carbon Assessment Tool is provided 'as is', without warranty of any kind, express or implied, including but not limited to any warranties of merchantability, fitness for a particular purpose and non-infringement. In no event shall the authors or copyright holders be liable for any claim, damages or other liability, whether in an action of contract, tort or otherwise, arising from, out of or in connection with the tool or the use or other dealings in the tool.

Embodied carbon results are intended to provide a ‘guide’ for comparison purposes and should not be taken as a definitive value for the project.

The Future Homes Carbon Assessment Tool relies on users inputting project information, including high-level building geometry inputs and selecting pre-defined build-ups for one or more elements. Pre-defined build-ups and associated material quantities within the tool are based on typical indicative build-ups and may not reflect the exact constructions and quantities used in your project.

Users should therefore carefully consider and take responsibility for how they apply the tool

[[Category:Articles_needing_more_work]]