Technical annex: hydrogen heating - Introduction and approach - A significant amount of attention has been paid to whether hydrogen could

The analysis also uses assumptions for the hydrogen infrastructure that will be needed and the level of disconnection and decommissioning of the gas network that will be required for each of the three scenarios, based on research by Arup.7 The number of properties on hydrogen heating in this research does not fully align with the scenarios described above, but is a reasonable indicator of the exte. [...] This assumption is based on: • A cost of producing hydrogen with a lower estimate of £0.07 per kWh and a higher estimate of £0.13 per kWh21 • A cost of transmission and distribution of the hydrogen of £0.01 per kWh, in line with the network component of natural gas bills today22 • An addition of 25 per cent to cover supplier operating costs, supplier margin and VAT.23 The running cost of electric. [...] The heat pump will need to be installed outside the property and connected to the electricity supply, with the natural gas boiler removed and the heat pump connected to the existing wet system. [...] The size of the segment, and therefore how many properties would be affected at the same time, is driven by both the engineering design of the network and by the need to limit the length of time properties have no access to fuel for heating and producing hot water – 48 hours is expected to be the maximum time window feasible.56 The process would therefore likely require activity across thousands o. [...] Repeated engagement with customers was a key part of the town gas conversion, which changed the fuel source to properties connected to the gas network in the 1960s and 70s.61 The shared conversion process means that engineers would need to be able to access every property in each segment of the network during the 48 hour conversion window.