Project type: Residential, individual house
Project location: France
Completion: 2022
Product: Vertical Waste Water Heat Recovery (VX2100)
Partner: Evolsys
Domestic hot water production is one of the largest energy consumers in residential buildings. In this project, the goal was to reduce electricity consumption for hot water while maintaining comfort for the occupants.
To improve energy efficiency, a vertical wastewater heat recovery system (WWHR) was installed on the shower drain. This technology recovers heat from warm wastewater and uses it to preheat incoming cold domestic water.
A ShowerPipe vertical shower heat recovery unit was installed in the house.
Measurements show that:
Incoming cold water initially enters at approximately 6°C
After only a few seconds of operation, the preheated water temperature reaches around 26°C
This significantly reduces the energy required to heat water to the desired shower temperature.
The combination of system changes significantly improved overall energy efficiency.
The total electricity consumption for hot water production in the house was reduced by a factor of 2.7.
Energy savings were achieved through several factors:
40% from eliminating storage and distribution losses
15% from reducing shower flow rate
43% from heat recovery using the ShowerPipe system
The passive heat recovery system recovers a large share of the thermal energy that would otherwise be lost through wastewater
Significant reduction in energy consumption for hot water
Lower electricity costs for residents
Passive system with no moving parts
Continuous heat recovery during shower use
Suitable for residential buildings, social housing projects, hotels, wellness and sports facilities.
Wastewater heat recovery from showers offers a simple and effective way to improve energy efficiency with regard to DHW production. By capturing heat that would otherwise be lost through the drain, systems like the Recoup ShowerPipe can significantly reduce energy demand for domestic hot water.
With measurable energy savings and a straightforward installation, shower wastewater heat recovery is an effective solution for energy-efficient housing projects across Europe.
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