A2EP has identified that lowering the temperature of hot water for heating is a vital step for the electrification of commercial buildings. It will deliver major energy efficiency improvements and can more than halve the capital costs of replacing a fossil gas boiler with a heat pump.

To build the capacity of the commercial building industry to install heat pumps and electrify building stock, A2EP has created a workshop which will outline a simplified testing methodology that helps assess the readiness of a site for heat pump integration, especially in brownfield or retrofit environments where existing infrastructure may pose challenges with guidance for stakeholders on two key activities:

1. Lowering HHW supply temperatures

The workshop will encourage initiating testing regimes to explore this possibility and ensure the system's performance at lower temperatures.

2. System capability testing

A generalised methodology for assessing whether existing HHW systems can accommodate lower supply temperatures will be presented and include baseline testing, field testing at reduced temperatures, and monitoring system responses such as flow rates and zone temperatures.