Current status: Answered by Michael Matheson on 22 August 2021
To ask the Scottish Government how many (a) housing developments and (b) homes (i) are or (ii) will be connected to residential district heating networks that are operational or in development.
The answers to each part of this question are as follows:
The data currently held on heat networks comes from data collected by the Office for Product Safety and Standards (OPSS) under the Heat Metering and Billing Regulations. Heat network operators are required to notify every 4 years. The latest data held is for 2018. Figures for 2019 and 2020 are not yet available.
Regarding future developments, planning applications for individual homes and housing developments are taken by planning authorities in the first instance. Where planning permission is granted there is no requirement to notify the Scottish Government or the Scottish Ministers of the decision. While the Scottish Government does collect some information on the performance of planning authorities this does not break down into details of individual applications.
The Heat Networks (Scotland) Act sets statutory heat network deployment targets, requiring 2.6 terawatt hours of output by 2027 and 6 terawatt hours by 2030. The targets are broadly equivalent to 120,000 and 400,000 average gas using homes being connected to heat networks for 2027 and 2030 respectively.? As heat networks are generally anchored around large non-domestic buildings, which account for significant portion of heat supplies, these figures should only be considered illustrative.