We've contributed to new guidance on air-to-water heat pumps

The paper by the Passivhaus Trust is aimed at designers at the initial stages of design and covers design choices that have a substantial impact on energy performance. It includes some simple aspects that are easy to understand, and some more complex aspects that are often missed, even by experienced services engineers. Most can be applied to any project irrespective of building energy standards.

Reviewed and endorsed by CIBSE, topics addressed include flow temperatures, overall system design, distribution losses, heat pump and emitter sizing, system controls, and input into PHPP.

Download 'Air-to-water heat pumps: The basics of energy efficiency' at the Passivhaus Trust website.