Guidance
Heat Network Technical Assurance Scheme (HNTAS): assessment procedures
Draft versions of the assessment procedures established to help heat networks demonstrate compliance with the Heat Network Technical Assurance Scheme.
Applies to England, Scotland and Wales
Documents
Details
These draft assessment procedures relate to the upcoming Heat Network Technical Assurance Scheme (HNTAS) and detail the activities to be undertaken to provide assurance that the obligations in the Technical Specifications are fulfilled.
They are for use by:
- heat network assessors
- heat network developers
- heat network designers
- heat network operators
Each assessment procedure corresponds to an equivalent technical specification.
Next steps
We will publish further draft technical specifications and assessment procedures for new build networks and for existing networks at a later date.
Final versions of these documents will be available once the scheme is live in 2026.
Updates to this page
Published 30 July 2025