As the bathroom sector continues to focus on sustainability, energy efficiency and regulatory compliance, one area is gaining rapidly increasing attention: Waste Water Heat Recovery for Showers, commonly abbreviated as WWHRS. At the forefront of this technology in the UK is Recoup Energy Solutions, a specialist manufacturer dedicated to recovering the heat normally lost down the drain and turning it into measurable energy and cost savings.
What is Waste Water Heat Recovery (WWHRS)?
A typical shower sends warm water straight down the drain, wasting most of the heat energy that has already been paid for. In fact, 85–90% of shower heat energy is lost in this way. A WWHRS unit captures that heat before it disappears.
Recoup systems use a high-efficiency heat exchanger to transfer heat from the outgoing waste water to the incoming cold water supply. This preheated cold water then feeds either the shower, the hot water system, or both, significantly reducing the energy required to generate hot water. The result is energy savings of up to 60% per shower use, with no change to the user experience.
WWHRS operates automatically, requires no user interaction, no apps, no planned maintenance, and is entirely hidden from view once installed—making it highly attractive for residential, social housing and commercial applications.
Why WWHRS is Being Widely Adopted
For building owners and operators, hot water production is one of the largest contributors to energy use and carbon emissions. By reducing hot water demand at source, WWHRS directly supports:
- Lower energy bills
- Reduced CO₂ emissions
- Improved SAP scores
- Compliance with Part L Building Regulations
- Progress toward net zero targets
This makes WWHRS particularly relevant where showers are used frequently, including homes, apartments, care settings, leisure facilities, and workplaces.
Where WWHRS is Used
New Build Residential
In new-build housing, WWHRS is increasingly specified as part of the standard energy strategy. Recoup’s vertical Pipe HEX systems form part of the SAP notional dwelling, making them a proven solution for achieving Part L compliance. These systems are discreet, highly efficient, and straightforward to design into new layouts, especially for first-floor showers.
Social Housing and Retrofit
Social housing providers are under growing pressure to reduce energy costs for tenants while upgrading existing stock. Recoup offers multiple retrofit-friendly solutions that minimise disruption and deliver immediate reductions in hot water energy demand. Many installations can be completed in hours, offering a cost-effective route to EPC improvement.
Non-Residential and Commercial
In gyms, leisure centres, sports facilities and other high-use shower environments, WWHRS delivers particularly impressive returns. Recoup’s commercial Drain+ range has proven that payback periods can be as short as one year, with energy savings reaching tens of thousands of pounds annually.
Overview of Recoup’s WWHRS Product Range
One of Recoup’s key strengths is that there is a product for every shower environment:
- Recoup Pipe HEX
A high-performance vertical WWHRS for first-floor showers, ideal for new-build homes and large renovations. It delivers the highest efficiency in the range, saving up to 60% of energy per shower use. - Recoup Pipe HEX Active
Designed for retrofit where vertical drainage runs are not available. A low-power pump lifts waste water into the heat exchanger, allowing same-floor installations without structural changes. - Recoup HeatDeck™ Shower Tray
A shower tray with integrated WWHRS, making it an ideal replacement solution for bathroom upgrades and retrofits, with a range of sizes and finishes - Recoup Easyfit+
A horizontal under-bath WWHRS designed specifically for showers over baths. It fits neatly beneath standard baths and is suitable for new build apartments, bungalows and retrofit EPC upgrades. - Recoup Drain+ Range
Commercial-grade WWHRS wet room drain units designed specifically for spaces with multiple shower use, typically used in gyms, leisure centres and sports facilities where potential energy savings are substantial.
Electric Showers and WWHRS: What You Need to Know
Standard electric showers cannot be used with WWHRS due to the risk of thermal cut-out activation or scalding, as they are not designed to accept preheated water
However, Recoup WWHRS can be safely integrated with the Mira Showers Heatloop™, the first electric shower specifically designed to work with WWHRS. Heatloop™ automatically reduces power consumption as preheated water is received, ensuring safe operation while delivering genuine energy savings.
A Proven Technology for the Bathroom Sector
For manufacturers, suppliers and specifiers of bathroom products, WWHRS is no longer a niche solution—it is a practical, regulation-ready technology addressing real-world energy challenges. Recoup Energy Solutions stands out by offering a comprehensive product range, proven performance, and compatibility across residential and commercial markets.
By recovering heat that would otherwise be wasted, Recoup helps make every shower more efficient, more sustainable and future-ready—without compromising design, comfort or functionality.