What does HNTAS mean for heat network managers?

With the recent draft updates to Heat Network Technical Assurance Scheme (HNTAS) now released, one thing is becoming increasingly clear on the ground:

We are still regularly coming across unregistered heat networks and networks operating without adequate, or compliant metering.

That matters — because under the direction of travel set by DESNZ, Ofgem and HNTAS, “run to failure” is no longer going to be an acceptable operating model.

Planned Preventative Maintenance (PPM) is not going to be a ‘nice to have’.
It’s heading towards being a required, evidenced strategy.

The draft HNTAS documentation places clear emphasis on:
• demonstrable asset knowledge
• performance monitoring
• metering accuracy and data integrity
• proactive maintenance aligned to system risk
• auditable decision-making

In other words, it won’t be enough to say “nothing has gone seriously wrong yet”.

If a network:
– isn’t registered
– doesn’t have compliant metering
– can’t evidence maintenance decisions
– or relies on residents being the early warning system

then it is already exposed.

From our experience, the networks that struggle the most are not always the ones with the oldest assets. It’s those without structure, data, and documented maintenance processes.

PPM is no longer about ticking boxes.
It’s about protecting residents, controlling operating costs, and demonstrating ongoing regulatory competence.

The question is no longer “Do we need preventative maintenance?”
It’s “Can we evidence that we did, or why we didn’t, do it?”

If you operate or manage a heat network and aren’t yet confident your maintenance strategy would stand up to HNTAS scrutiny, now is the time to get ahead of it.

Not when regulation arrives.