Islington Council’s Bunhill Heat and Power Network (BHPN) is the first scheme in the world to take waste heat from an underground train network and use it to provide lower cost, greener heat to local homes, a school and leisure centres.
The Bunhill phase 2 project is an extension of the existing BHPN which has been providing cheaper, greener heat to over 800 homes in London’s Old Street area since 2012.
The original network is powered by a Combined Heat and Power engine, using heat created from producing electricity to heat buildings and provide hot water. Unlike normal electricity production that wastes up to two thirds of the fuel used to make it, the waste heat is captured for the heat network.
The success of Bunhill phase 1 encouraged the council to extend the network to supply heat and hot water to 550 additional properties, as well as creating capacity to add further private connections in the future.
To achieve this, Islington partnered with Transport for London (TfL) to develop a first of its kind project, capturing waste heat from one of the ventilation shafts from the tube network, helping to create greener heat for residents and remove heat from the Tube to make journeys more comfortable.
This project is playing an important role in Islington’s commitment to become a Net Zero Carbon borough by 2030, helping lower heating bills, improving air quality and making the capital less dependent on fossil fuels.