Our heat hubs create low-carbon heat that is delivered to you and your neighbours, as hot water, through a network of highly insulated pipes. The heat interface unit (HIU) transfers the heat from the network into your home.

The temperature of the hot water we deliver will be quality controlled to make sure that you get the heat you should. Our heat networks operate with flow temperatures in excess of 50°C. We’ll operate the network to allow for a 30°C heat reduction in your home, with a maximum return flow temperature of 40°c. For example, if your system is designed to accept hot water from the heat hub at 65°C, heat is taken out by your radiators or underfloor heating and the water is returned to the heat hub at 35°C. The 65°C delivery temperature is our quality control point and, the 35°C return temperature, is your quality control point. This is very similar to a domestic boiler system, where water is heated and then distributed around your home.

Heat is taken out of the system as the water travels around your radiators and the water is then reheated in the boiler as part of a continuous process.