SKW Greywater
Heat recovery from greywater — capturing the energy in warm wastewater from showers and pools and returning it to the building.
Heat recovery, reference project
System efficiency, reference project
Water cleaning and processing
Energy tracking in the monitoring app
Recover the Heat That
Goes Down the Drain
Warm greywater from showers, pools and other water-intensive operations carries a large amount of energy that is normally lost to the sewer. The SKW Water series recovers this heat and returns it to the building’s energy system.
The first installation — a prototype for the Reval Sport swim club in Tallinn, Estonia — combines energy recovery ventilation with a 1 MW greywater heat recovery system reaching a system COP of 16.5.
Typical applications are swimming pools and aquatic centres, sports and wellness facilities, and other buildings with a steady flow of warm wastewater.
- Automated cleaning
The water is cleaned automatically as part of the recovery process. - Continuous monitoring
Water processing and system operation are monitored at all times. - Energy tracking in kWh
Follow the recovered energy in the Skawen monitoring app. - Works with ventilation heat recovery
Combined with energy recovery ventilation in the same project.
How SKW Greywater Recovers the Heat
Warm greywater passes a staged heat exchanger, and a water-to-water heat pump raises the recovered heat to a temperature the building can use. Hover the markers on the diagram for the individual components.
