Passively Recovering Waste Heat Energy With Every Shower

Recoup Retrofit+

This compact, single walled WWHRS is easy to install, easy on the pocket and easy to maintain! As it’s name suggests, it’s ideal for retro-fitting in domestic and commercial properties. A very cost effective way to achieve efficiencies of up to 22%. The Retrofit+ waste water heat recovery system can be installed under baths with showers, shower trays or even be boxed in next to your drain. The system had impressive success through the Green Deal home improvement scheme up until the withdrawl in September 2015 but still provides the added benefit of adding towards the silver standard for Scottish Housing Association homes. Perfect for landlords, housing associations, hotels or home owners wishing to save costs on their hot water usage, this system is the must have upgrade for your property. When the cost vs benefits are weighed up, we are sure it will tick all the boxes.

Features and benefits

  • Compact system for ease of positioning
  • KIWA validated efficiencies of up to 22%
  • WRAS approved
  • Legionella control risk assessed
  • Extremely affordable
  • Easy to install – no major renovation or pipework required
  • Option of 3 system installation variations
  • Helps gain Silver Standard in Scotland
  • Proven success through the GDHIF!
  • Virtually maintenance free
  • SAP listed

Product application

House, Bungalow or ground floor, and Apartment Product Application

Product diagram

Recoup Retrofit+ Diagram

Data & Specification

Specification details

Description Value Unit
Overall height for installation 2400 mm
Outside diameter of external tube 63 mm
Material – Internal tube Copper
Material – Internal tube PVC
Shower flow rate 5 – 12.5 litres/min
Max. Mains water inlet pressure 10 bar
Min. Mains water inlet pressure 1 bar
Max. Waste water working temp 85 °C
Mains water connection ½” male BSP
Waste water connection 50 mm
Weight 7.9 kg
Water volume – mains water 0.3 litres


Performance & efficiency

Shower Flow Rate @ 40°C ( litres/min )

ReTROFIT+ efficiency ( Recovered energy kWh )

System A System B System C
9.0 19.9% (3.75) 17.1% (3.22) 19.1% (3.60)
9.2 19.7% (3.79) – – – – –
11.0 18.4% (4.23) 16.2% (3.72) 17.6% (4.05)
12.5 17.7% (4.63) – – – – – –


Pressure drop on mains water circuit

Shower Flow Rate @ 40°C (litres/min)

ReTROFIT+ Pressure drop ( bar )

System A System B System C
5.5 0.14 <0.08
7.5 0.20 <0.12
9.2 0.24 <0.14
12.5 0.36 <0.21

Technical information and downloads

Recoup Retrofit+ DrawingRecoup Retrofit+ Drawing

Recoup Retrofit+ Drawing document.

Download Here…

Recoup Retrofit+ installation and dataRecoup Retrofit+ installation and data

Guide to the installation, product details, performance and operation of the Recoup Retrofit+ product.

Download Here…

Recoup WWHRS BrochureRecoup WWHRS brochure

Recoup's Waste Water Heat Recovery Systems (WWHRS) Brochure and Portfolio to download, save, print or share. Provides background information on WWHRS, SAP assessment, product options, features, benefits and frequently asked questions. Download here...

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