UK wants more homes heated by waste heat from datacenters

Datacenter waste heat can now be used to provide affordable home heating in the UK.

The UK government is investing £90 million ($119 million) to develop and improve heat networks that utilize waste heat from datacenters and factories to warm homes. This initiative aims to provide cheaper heating for over 750,000 homes. A significant part of the funding, £41 million ($54 million), is allocated to a "mega heat project" using a tunnel under the River Thames to supply 650,000 London homes with clean heat. The barge-based transport of hot water is expected to begin in 2028, with tunnels envisioned for the 2030s. While the government promotes this as a way to reduce reliance on gas and build public support for datacenters, concerns remain regarding project timelines, engineering challenges, the efficiency of lower-temperature waste heat, and the reliance on older heat network technologies in the UK.

This government investment signals a significant push to integrate datacenters more directly into urban infrastructure, viewing their waste heat as a valuable energy resource rather than a disposal problem. The initiative addresses public concerns about datacenter expansion and aims to position these facilities as beneficial to local communities, potentially smoothing the path for future developments. By incentivizing the use of waste heat, the UK is encouraging a circular economy approach within its digital infrastructure sector.

The success of these heat networks hinges on overcoming significant engineering hurdles and the efficiency of existing and future heat network technologies. Public opinion surveys suggest a strong willingness to support datacenters if they contribute to local heating, indicating that waste heat utilization could become a key factor in public acceptance and regulatory approval for new facilities.