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NETWORK / 25 / FEBRUARY 2018 priority under current funding constraints. Finally, there is an opportunity for old community heating systems to be modernised to reduce costs for social landlord and tenants. Upgrading old schemes will also aid the introduction of heat meters; the Citizens Advice Bureau pointing out that the retrofitting of heat meters is generally impractical in many older systems. 11 Criteria for award process for fast- track The "gap funding" principle of HNIP should apply to avoid issues of additionality. In this case, the award should be based on the gap between what the social landlord can raise in capital for the project and what the project is estimated to cost. Internal rates of return (IRR) used in HNIP may need to be re-examined as a metric because social landlords consider that heating systems are a basic provision of the service to the tenant and private leaseholders. Instead, the on-cost to the resident household should be the main consideration, with perhaps a guide being that the household's new annual heating bill should not exceed 90 per cent of their current bill, as Aberdeen set out to do and easily achieved. Where possible, an alignment with Affordable Warmth criteria back up boilers. Household control of heat was substantially improved and a tenant could have warmed their home for approximately half of the previous electric white meter bill. The total cost of the scheme was £1.6 million, of which the government provided £730,000. Electric heating in cities is concentrated in high-rise, public and private. Stratton estimates that 6,535 social housing tower blocks were built in the 1960s. Even allowing for some demolition there may remain at least half a million existing high-rise flats in the UK with old heating systems, that may be convertible to modern heat networks. This is over double the 200,000 homes presently supplied by district heating. The Energy Company Obligation (ECO) was a successful programme for heat networks triggering around a quarter of a million pounds of total investment in the four-year period 2012-2016. In addition, a thousand connections were made under the ECO predecessor, CERT. Around half the social housing heat network schemes installed or improved in the period 2013-2016 had support from ECO 1 and 2. Unfortunately, energy suppliers say they are no longer investing in heat networks as part of the extended ECO (ECOe) to 2018 because they can support more basic measures, such as loŸ insulation, at a lower cost of carbon. Reasons for a fast-track in HNIP BEIS does recognise that social landlords need support to create heat networks and a small revenue grant scheme for feasibility studies is provided from BEIS via the Homes and Communities Agency. Logically, social landlords should also have special consid - eration under HNIP. The application process used in the HNIP Pilot, if largely repeated in subsequent rounds, may be too complex, expensive and uncertain of outcome for small schemes to apply, especially, by defi - nition, there is not enough money available to pay for the scheme without external sup- port. Criteria for awarding funding should be simpler, to reflect the limited scale of the projects and of the applicant. Following the Grenfell Tower fire, many social landlords with towers will be devoting considerable financial and human resources to replacing external cladding. This may lead to the delay or cancelling of viable heat networks projects. We have already heard that access to ECOe funding for heat networks has dried up. Access to a straightforward, fast-track HNIP process may encourage social landlords to persist with projects presently considered a lower in ECOe and similar future programmes paid out of the Levy Control Framework should be considered. It should also be possible to integrate with the ECOe on carbon. Any project receiving funding should be conditional on following the CIBSE/ADE Code of Practice and future connection to a larger heat network scheme, if this leads to lower heat costs. Membership of the Heat Trust could be compulsory. BEIS has moved to one round of HNIP funding per year. To suit the rapidity of installation enabled by smaller scale projects with one landowner, it is proposed that a rolling application process is set up for small schemes, or that there be frequent and regular rounds each year. Conclusion and next steps The fast-track process is not meant to be a substitute for the wider HNIP but a useful sub-section of it. The HNIP pilot saw £24m awarded out of £39m allocated, so perhaps the £15m leŸ over could fund a pilot proce - dure for small housing-only schemes. On 5 October 2017, the Danish Embassy (trade section) organised an event for social landlords on heat networks. Audience consensus was positive regarding a fast-track. Feedback will be sent to BEIS, including from responses to this article. Hopefully, enough evidence will be presented so BEIS will devote resources to investigating a fast-track procedure. "There is an opportunity for old community heating systems to be modernised." Feedback welcomed Answers to the questions below will be ag- gregated and the results forwarded to BEIS as evidence. 1. See the reasons for appropriate treat- ment of social housing applications to HNIP. Do you agree or disagree? Please give reasons. 2. Do you know of any prospective heat network (district heating) scheme for social housing (or a council-owned local housing company) which requires additional external funding before it can go ahead? Please give details. 3. Do you know of any old district or com- munity heating scheme for social hous- ing which requires additional external funding before it can modernised? Please list. 4. Do you have any further comments on the document or on the subject? Please provide your name, organisation, and contact details and email your replies to ianman@um.dk