HNTAS: DraftNew Consumerbuild Heatheat Systemnetworks - draft technical specifications for newConsumer buildHeat heat networksSystems

These technical specifications for heat network consumer heat systems detail the draft requirements and technical obligations to be fulfilled as part of the upcoming Heat Network Technical Assurance Scheme (HNTAS).

A consumer heat system is the heating, cooling and/or hot water system within a consumer’s premises.

The specifications include the:

• technical requirements to be met 
• performance monitoring requirements to be met 
• key failures to be avoided  
• evidence requirements to be provided to demonstrate conformity with HNTAS

They are for use by:

• heat network developers
• heat network designers
• heat network operators
• heat network equipment suppliers
• organisations within the heat network supply chain

These technical specifications correspond to the draft HNTAS: New build heat networks - draft assessment procedures for heatConsumer networkHeat consumer heat systemsSystems.

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.