The first of more than 60 240m-deep geothermal boreholes has been completed on the Salisbury Square Development at Fleet Street, EC4, in the City of London, marking a major step towards reducing the scheme’s carbon emissions.
It will be the first development in the Square Mile to use a stand-alone closed-loop heating and cooling solution, which removes the requirement for gas.
The development, funded and being delivered by the City of London Corporation, will house a flagship facility for HM Courts and Tribunals Service and a new state-of-the-art headquarters for the City of London Police. It will also include grade-A office accommodation, a remodelled listed building and an enlarged and improved public realm.
The Corporation is committed to reaching net zero by 2040.
The boreholes for the ground source heat pump solution are some of the deepest ever to be drilled in the City – to a depth of more than three-quarters of the height of the Shard – and are being installed by the scheme’s main contractor, Mace, and subcontractor, G Core.
The system takes advantage of consistent temperatures deep underground and is the most energy-efficient method of heating and cooling, using all-electric solutions with power from renewable sources with no burning of fossil fuels.
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