CUI Office-Res Conversions GHG report vF
31 January 2023
The length of time for the savings to be fully offset is driven primarily by the efficiency differential and the carbon intensity of the grid. [...] Where the graph intersects the x-axis, it indicates the year in which the emissions avoided in the conversion are fully offset, and therefore the conversion project begins to have a net negative carbon impact on a cumulative basis. [...] If the graph does not cross the x-axis, the embedded emissions are not fully offset, so the re-use project would result in a net carbon reduction over the life of the building, and a new build would have a net carbon increase. [...] Increasing the efficiency of the converted building to 15% better than the median doubles the time to the offset of emissions from 21 to 42 years, and achieving 20% could see a net carbon reduction over the project life. [...] While there is slightly less overlap between the ranges than in the Heritage type, the overarching story remains consistent: the more carbon- intense the grid, the higher the need to improve efficiency in conversion projects.