Passively Recovering Waste Heat Energy With Every Shower

10 Years of Passive Energy Saving with Recoup WWHRS

Nov 10, 2021 | Recoup WWHRS

Formed in November 2011, Recoup Energy Solutions Ltd have become the leading UK specialist in Waste Water Heat Recovery Systems for Showers (WWHRS), we are celebrating our 10-year anniversary.

Recoup 10 Years of WWHRS

Over 10-years Recoup WWHRS have been instrumental in the expansion of Waste Water Heat Recovery as a recognised and accepted energy saving technology. We have established long-standing supply relationships with leading UK housebuilders and UK-wide merchant distribution partners, firmly establishing us as the UK market leader for WWHRS.

A sole-supply partnership with the UK’s largest housebuilder, Barratt Developments Plc, which began in 2013, has seen WWHRS designed into thousands of homes across the UK, with many tens of thousands more expected to be installed in the coming years; a move designed to help Barratt meet their ever more stringent energy efficiency targets.

In fact, Barratt’s Z-House, a unique zero-carbon concept home that looks beyond the 2025 Future Homes Standard to showcase the future of sustainable living, is designed with the Recoup Pipe HEX as a key passive energy reduction measure, also complimenting other low carbon technologies such as air-source heat pumps. Don’t worry that you don’t see it within the video, that is the point of WWHRS. It’s a passive energy-saving product, that is installed within the building fabric, hidden away from sight. It’s not flashy; it’s not trendy; it just works….and Barratt have been installing Recoup WWHRS in many of their new homes since 2013! To find out more about Recoup WWHRS in the Barratt Z House see our article.

Looking back to ten years ago, just mentioning Waste Water Heat Recovery would typically receive confused or questioning replies, even amongst some energy specialists! WWHRS was often confused with energy generation technologies, rather than being passive energy reduction measure. However, over the past ten years, Recoup have worked to provide the highest quality education, CPD-learning and instruction resources which are now used by architects, specifiers, energy specialists and developers across the UK. All of our products are SAP & SBEM listed; WRAS accredited; Legionella risk assessed; and provide the highest performance efficiencies currently possible.

Now in 2021, Recoup’s market-leading Pipe HEX vertical heat exchanger which provides the next generation of improvements on two previous vertical models, has been redesigned specifically to tie in with upcoming Part-L 2021 regulation changes. With the Pipe HEX, greater efficiency, means more SAP points, therefore better value for new-build developers and the homeowner: reducing the hot water required for showering by up to 55%.

Recoup Pipe HEX Corner Boxing Install & Cut-through

Looking to the future, Recoup is poised for significant expansion. Driven by demanding new building regulations and a global shift towards more sustainable and low embodied carbon solutions, they are increasing their team and operations to accommodate exponential growth in the UK. This growth is expected to come not only from the new-build housing sector; but apartments; hotels; student accommodation, and the need to retrofit green technologies to homes across the UK.

Altogether, it has been a busy 10 years for Recoup WWHRS, a company that started as two people with an ambition to reduce energy demand and carbon in the built environment. This ambition and dedication from their team has turned Recoup into the specialist it is today.


The regulation states that any fluid of category 4 or 5 must be separated by a double wall in order to comply. It is generally accepted (but debateable) that the change of fluid category associated with showering is at the point of the trap for the shower where it passes from its lowest possible category of 3 to a category 5 fluid on joining the rest of the waste system. There are certainly some circumstances where the shower waste itself prior to the trap may be deemed as a category 5 fluid.

Therefore, in order for a single walled product to comply, additional design and installation requirements are required.

The primary implication of this it that a drainage trap must be installed downstream of the unit, and therefore a trap should not be installed before the WWHRS. Removing the trap from the normal position at the bath or shower tray, and then relocating it downstream of the WWHRS unit (often on the floor below the shower or bathroom), can present several significant issues to both the installer and homeowner:

Recoup WWHRS Learning

Recoup WWHRS Learning is our online education portal for all things waste water heat recovery. Made up of courses containing lessons and quizzes it goes from an introduction to waste water heat recovery for showers to product installation courses. Find out more here.

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