Registering Heat Networks to the PCDB

Developers are increasingly required to deliver homes with an EPC rating of at least Band B, yet achieving this often demands significant design changes. For sites connecting to a district heat network or developing their own on‑site network, a more effective approach can be to register that network with the BRE‑administered Product Characteristics Database (PCDB).

This allows SAP assessments to use validated design performance data rather than default assumptions. A well‑designed network entered into the PCDB can achieve a Distribution Loss Factor (DLF) as low as 1.2 compared with SAP defaults of 1.5 or 2.0, without any modification to the design. This leads to lower modelled energy consumption for dwellings, which in turn improves EPC ratings.

The duration for which a PCDB entry remains valid depends on the type of data submitted, and each block connected to the network requires its own submission. Design based entries remain valid for two years from the network’s commissioning date. This two-year period typically provides sufficient time from network commissioning to full occupation, enabling SAP assessors to select the heat network from the database when issuing EPCs.

After the initial two‑year period, any renewed PCDB submission must be based on metered heat consumption data. Metered data remains valid for two to seven years, depending on the number of heat generators. In practice, this stage is rarely needed, as it would only apply if a single block took more than two years to reach full occupation