Heat network guides
Free tools
Is my building a heat network?
Check whether your block's communal heating is in scope.
Heat network readiness check
Score your current readiness and see the gaps.
Authorisation conditions explained
Read all 29 conditions in plain English.
Getting registered
Ofgem heat network regulation: what it means for leasehold blocks
What Ofgem heat network regulation means for blocks of flats with communal heating: who is responsible, what applies now and the 2027 deadline.
How to register a heat network with Ofgem
A step-by-step guide to registering an existing heat network on Ofgem's digital service by 26 January 2027: who registers, what you need and what happens next.
Heat network operator vs supplier: who is responsible?
Who is the operator and who is the supplier of a heat network in a leasehold block: freeholder, RMC, RTM company or managing agent? Ofgem's view explained.
Heat network exemptions: HMOs and the 45 kW rule
Two kinds of building are exempt from Ofgem heat network regulation. What regulation 13(2) says about HMOs and converted buildings with one small boiler.
Missed the heat network registration deadline? What to do
What to do if your heat network isn't registered with Ofgem by 26 January 2027, what Ofgem has said about enforcement and how to catch up quickly.
Running the network
Heat network complaints procedure: what Ofgem requires
What Ofgem requires of a heat network complaints procedure: what to include, telling residents every year, keeping records and the 8-week Ombudsman route.
The Energy Ombudsman for heat networks
Heat networks must join the Energy Ombudsman scheme. When residents can go to the Ombudsman, what a deadlock letter does and what it can't look at.
Heat network Priority Services Register: a guide for blocks of flats
Heat suppliers must keep a Priority Services Register and offer free priority services. Who it's for, what to offer and how to keep residents' details safe.
Heat network continuity plan: what it must include
Ofgem's minimum contents for a heat network continuity plan, the yearly confirmation, and how a small block can put one together without consultants.
Heat network material asset register: what to record
What Ofgem says a heat network material asset register must record, for equipment and contracts, and how often to review and update it.
Heat network fit and proper test and SMRI declarations
Who counts as having significant managerial responsibility or influence, the fit and proper requirement and why SMRI declarations expire after 3 years.
HNTAS explained: the Heat Network Technical Assurance Scheme
What the Heat Network Technical Assurance Scheme is, what the government proposed for existing networks, and why nobody can be HNTAS certified yet.
Money and billing
Heat network back-billing and service charges
How Ofgem's 12-month back-billing limit works with section 20B's 18-month rule for service charges, and where leaseholders take disputes.
Heat network financial resilience reporting
The financial resilience data Ofgem asks heat network operators and suppliers for, when it's due each year, and the ring-fencing of maintenance funds.