Reporting emission data for Maintenance (B2) and Repair (B3) is possible in a select number of calculation tools. The reason for omitting these life-cycle stages to be reported in the majority of tools is due to no accurate methodologies existing to report these figures.
Including the option to report these life-cycle stages would result in these queries being left empty for the majority of assessments.
Exceptions to Reporting B2 and B3 data
Maintenance (B2) Emissions
Reporting Maintenance emissions in One Click LCA is possible with a select number of tools. The emissions are reported by manually filling in Maintenance data. Since it is rare that projects already possess maintenance data at the time of the assessment, maintenance is often not included in the assessments.
Manually reporting maintenance emissions includes the option to report:
- The annual consumption of grid electricity used for maintenance
- The annual consumption of water used for maintenance
- The annual consumption of fuels used for maintenance
- The annual replacement of parts as part of preventive or regular maintenance
Reporting Maintenance Emissions in the UK
The most accurate method to report maintenance is to include actual consumption of electricity, water, fuel, and parts replaced, however, since this data is often not available the RICS guide has come up with a scenario that can be used for maintenance emissions. This method of assessment calculation is expected to be integrated into the UK calculation tool during 2023.
Repair (B3) Emissions
Reporting Repair emissions in One Click LCA is possible with a select number of tools. These emissions are either recorded with a repair rate or pre-existing scenarios from official methodologies.
Reporting Repair Emissions in the UK
If you are undertaking assessments in the UK we often refer to the RICS guide for calculation methodologies. The RICS guide reports the following:
Data from facilities management/maintenance strategy reports, façade access and maintenance strategy, life cycle cost reports, O&M manuals, professional guidance, e.g. CIBSE Guide M, should be used to develop scenarios for repair. 22 RICS professional statement Effective from 1 May 2018 Whole life carbon assessment for the built environment. In case none of these sources is available, repair emissions should be assumed as equivalent to 25 percent of maintenance emissions [B2] for the relevant items as specified in 3.5.3.2.
Since scenarios have not been developed, for your assessments you can utilize the assumption that your B3 emissions are equivalent to 25% of your B2 emissions. This method of assessment calculation is expected to be integrated into the UK calculation tool during 2023.
Reporting Repair Emissions in Japan
If you are undertaking assessments in Japan you will find that your calculations often have a default B3 percentage. In Japan, the repair rates are dependent on the material type and have default values. If you would like to know more about this please check the CASBEE_LCCO2 calculation sheet (in Japanese).
Reporting B2 and B3 data in Infrastructure LCA
Our infrastructure tools that report on B2 and B3 use the same setup as above, however dependent on the tool allow also specifying materials included to the 'construction' materials tab directly as either Maintenance or Repair emissions.
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