Spotlight: the Liddell ground source heat pump
In 2022–23 Christ Church undertook a substantial project to provide a new source of heating and hot water to its portion of the Liddell Building, containing 69 student rooms, ancillary areas and the common room. It was decided to install two 80kW ground source heat pumps below a playing field.
The historic playing field, bequeathed to Christ Church by Henry VIII in 1546, was selected in part due to its lack of ecological value: the project, which required the boring of more than 50 holes at a depth of 68 metres, had minimal impact on our wild spaces.
The playing fields have now been restored to their former state, the ground source heat pumps providing a 66% reduction in energy consumption, saving over 24,800kg of carbon dioxide each year.