Government Departments: Buildings

Cabinet Office written question – answered on 13th July 2022.

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Photo of Lord Birt Lord Birt Crossbench

To ask Her Majesty's Government, further to the Written Answer by Lord True on 22 June (HL862), (1) by what date, and (2) by what means, the Whitehall Boiler System will be fully decarbonised.

Photo of Lord True Lord True Minister of State (Cabinet Office)

The date and means to fully decarbonise the Whitehall Boiler System are not currently known, as the next phase (Phase 2) of the project to reduce carbon emissions / decarbonise is currently undergoing a feasibility / options appraisal and is anticipated to be the subject of an investment decision as part of the next spending review (SR).

Phase 1 includes installation of pipework lagging (completed 2021/22) and replacing heat exchangers to lower the operating temperature (to be completed from 2022/23). Phase 1 will result in a carbon saving of approximately 17%.

Phase 2 is anticipated to run from 2024 to 2028 and include delivery of Ground Source Heat Pumps to achieve carbon savings of approximately 71% (including Phase 1 carbon savings).

Phase 3 is a further potential scheme that could connect into a wider district heating system anticipated from 2026 to 2035. Phase 3 could achieve carbon savings of approximately 92% (against current emissions).

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