HNTAS: DraftNew Districtbuild Distributionheat Networknetworks - draft assessment procedures for newDistrict buildDistribution heat networksNetworks

These draft assessment procedures for district distribution networks detail the activities to be undertaken to provide assurance that the obligations in the Heat Network Technical Assurance Scheme (HNTAS) Technical Specifications are fulfilled.  

A district distribution network is a pipework system that is external to buildings and which distributes thermal energy from one location within a heat network to another. This pipework can be comprised of buried or above-ground pipework, and typically contains pipework, valves, heat meters and other ancillary equipment.

The documents are for use by:

• heat network assessors
• heat network developers
• heat network designers
• heat network operators

These assessment procedures correspond to the draft HNTAS: New build heat networks - draft technical specifications for districtDistrict distributionDistribution networksNetworks.

Next steps

We will be requesting feedback on the information in these documentsdocuments. shortly. We will run a change management process in parallel with the the HNTAS technical technical standards consultation which launchescloses at midday on 1615 DecemberApril 2025.2026.

We will make final versions of these documents available before the scheme starts.