Waste Water Heat Recovery for Showers

Identifying WWHRS in a Property for EPC Assessments

Oct 8, 2026 | Energy Saving, Regulations, Technical & Installation Update

Recoup Waste Water Heat Recovery for Showers (WWHRS) contributes to a property’s Energy Performance Certificate (EPC) rating when correctly identified and recorded. For Domestic Energy Assessors (DEAs), recognising where these systems are installed in an existing property can be difficult during survey as they are generally concealed in boxings, under baths, or within shower trays.

It is essential to ensure that all eligible energy-saving technologies are reflected within the EPC assessment. This video will assist with identifying where WWHRS installation should be recorded and practical guidance on identifying common signs in homes that indicate a compliant system is present.

How to Identify WWHRS

The video covers:
    • SAP Registered Installations – How to identify when and installed system has been recorded and registered within SAP when built.
    • Preheat Supply Pipework – Identifying the tell-tale pipework signs that show waste water heat recovery is present.
    • Vertical WWHRS Units – Recognising the appearance and typical installation locations of vertical devices.
    • Horizontal WWHRS Units – Understanding where horizontal systems are commonly installed and how they differ from vertical units.
    • TMV Mixer Showers – Using a TMV Mixer shower to indicate the presence of WWHRS with certain installation methods.
    • Mira Heatloop (mIES) – Recognising that the presence of this product can indicate the inclusion of WWHRS.
By knowing what to look for and where to find it, DEAs can confidently identify existing Recoup WWHRS installations and ensure they are accurately recorded during EPC surveys, helping to deliver a more representative assessment of a property’s energy performance.For more information on Waste Water Heat Recovery for Showers, including guidance, product information and SAP-registered systems contact us.

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