Waste Water Heat Recovery Systems (WWHRS) data sheet

Waste Water Heat Recovery Systems attached to showers are a proven and cost effective way to achieve substantial energy savings, SAP points and carbon dioxide reductions. The system delivers the lowest £/point in SAP, making it very attractive as a new build product.

Technical information

The cheapest energy is the energy you throw away down the drain using a Waste Water Heat Recovery system.

The hot water from the shower goes down the drain, losing only a couple of degrees.

This hot water either clings to the side of the pipe exchanger or drips on to the coiled copper exchangers.

The cold feed is brought into the system on the other side of the exchanger.

The heat transfer from the outgoing hot to the incoming cold allows a temperature increase of around 15 degrees.

The pre-heated cold feed then feeds the shower mixer, boiler and/or cylinder.

There are now in excess of 20,000 systems installed within UK and Holland.

The system is recognised by the Buildings Research Establishment (BRE) within SAP 2005 (Appendix Q) & 2009.



Hints & Tips

The system is likely to pay for itself within 4 years, a significantly better return than any other sustainable/renewable product.

The system delivers the lowest £/point in SAP, making it very attractive as a new build product. It can also be retro-fitted.

The system achieves almost the same benefit to householders as a solar thermal panel at 30% of the initial cost, with no ongoing maintenance, or need to support with a customer service team.