MEHNA launches new national HIU guide under HNTAS
The Manufacturers of Equipment for Heat Networks Association (MEHNA) has launched a new national guidance document to support installers, commissioners and service engineers working with Heat Interface Units (HIUs) under the UK’s new Heat Network Technical Assurance Scheme (HNTAS).
‘Installation, Commissioning and Maintenance of Heat Interface Units for the Heat Network Technical Assurance Scheme’ provides practical guidance for professionals working on communal and district heat networks and has been developed to reflect the requirements of the Energy Act 2023, the Heat Network Technical Standard (TS1) and the forthcoming BS 8635 regulation.
The document covers the full lifecycle of an HIU installation, including:
- How heat networks function and where the HIU sits within the system
- Best practice installation for direct and indirect HIUs
- Commissioning procedures and acceptance testing aligned to HNTAS
- Ongoing maintenance and servicing requirements
- Fault-finding using heat meters and component testing.
It also aligns with key national standards, including TS1, the BESA HIU Test Regime, BS 7593, BS EN 12828, and forthcoming BS 8635 Part 2.
Jointly authored by technical specialists from across the sector and peer reviewed by manufacturers, network operators, consultants and policy bodies, the guide is intended as a reference document for trained installers and service engineers, as well as a supporting resource for designers, heat network operators and independent HNTAS assessors.
For further information and to read the guide, click here.
