This Practice Note summarises the obligations under the Heat Network (Metering and Billing) Regulations 2014, SI 2014/3120 (as amended). The Regulations affect landlords, management companies and developers who supply heating, hot water and air-conditioning to tenants in multi-let buildings. This Practice Note explains what the Regulations cover, why they were introduced, key amendments to the legislation (including their partial revocation by the Heat Networks (Market Framework) (Great Britain) (Amendment) Regulations 2026, SI 2026/7) and the key provisions. We recommend reading this alongside the related Practice Note: District Heating Networks in England and Wales: The evolving regulatory regime.