Decentralised Energy Networks – a Query from PlanArchway

A quick Google reveals that the Bunhill CHP system in the south of Islington caters to 700 homes and two leisure centres, and that a decentralised energy network needs to serve uses in addition to housing in order to even out peaks in demand.

In Archway we have some large development sites coming up, plus the hospital and the leisure centre. The questions are: how many residential units are needed to make a viable scheme, and broadly speaking how are the set up costs calculated?