The specifications for the new-look Heat Network Technical Assurance Scheme (HNTAS), have been published by
the Department for Energy Security and Net Zero (DESNZ).
For existing heat networks, the technical specifications, published last month, are structured as a series of milestones that they must meet over several years. Milestone 2 sets out minimum performance and reliability thresholds, including metering and monitoring requirements. At the next milestone, 3A, networks must submit performance improvement plans, showing that they have met HNTAS requirements. Achieving HNTAS certification is the final milestone, 4.
New-build networks will require an assessment pass at three key points in their life-cycle: before design begins on a network; prior to starting construction; and ahead of operation. An assessment pass will also be required after two years of operation, to ensure that performance levels continue to meet requirements.
Public consultation on the HNTAS opened alongside the publication of the Warm Homes Plan in January, and will run until mid-April.
Gareth Jones, managing director of FairHeat and lead technical author of HNTAS, said the introduction of mandatory technical standards is a ‘game-changer’ for the heat network sector.
‘Providing clear national standards will be transformational for developers and operators, and their customers connected to heat networks, who will experience better reliability, cleaner air, lower carbon emissions and lower energy bills.’
The draft of the Heat network technical standard (TS1), which states the minimum requirements for the design, installation, and operation of Heat Networks was published in November.
FairHeat has been appointed by DESNZ to deliver the interim technical support contract for HNTAS.
