Darwin College has set an ambitious target to remove all gas boilers from its estate by 2032. Combined with a commitment to purchase only 100% renewable generation electricity, this would achieve our target of zero Scope 1 and 2 carbon emissions in line with our strategic goal.

In many of our smaller off-site properties the solution lies in improving thermal efficiency through insulation and improved windows, as well as switching gas boilers for air-source heat pumps. However, on the main site we will be harnessing the thermal capacity of the river Cam which flows through the gardens.

Building works in 2025 and 2026 will involve the construction of a Pump House on the riverbank behind 12 Newnham Terrace, right on the edge of our estate bordering the Granta pub. This new building will house the mechanical and electrical equipment such as water pumps and heat exchangers that will eventually supply all the buildings on the main site with heat and hot water. A network of pipes will be laid in a trench that will run the length of the site distributing the hot water to be used for heating.

At the same time, thermal improvements will be made to the Rayne Building and Newnham Grange, including replacement windows, draught-proofing, wall insulation and loft insulation.

Updates on the project's progress and information for those living on site will be added regularly to this page, and answers to frequently asked questions can be found below.