What is a Waste Water Heat Recovery (WWHR)?
A Waste Water Heat Recovery for Showers is a system that recovers heat from used warm shower water. This heat is used to preheat cold potable water before it enters the boiler, shower or both.
The result:
- Your heating system uses less energy
- You reduce gas or electricity consumption
- You save money on your energy bill
With this system, you can save up to 40–50% of the energy used for showering.
How does a Waste Water Heat Recovery System work?
The system works with a copper heat exchanger:
- Warm wastewater flows down the drain
- Cold mains water flows alongside it
- Heat is transferred without mixing the water
- The preheated water goes to the shower or boiler
Because the water is already warmer, less energy is needed to heat it.
Benefits of a shower WTW
1. Immediate energy savings
A shower WTW can reduce energy use for hot water by up to 50% per shower.
2. Lower energy bills
Less energy use means lower monthly costs.
3. Environmentally friendly
Using less gas or electricity reduces CO₂ emissions.
4. Long lifespan
A shower WTW can last around 30 years and is mostly recyclable.
Performance monitoring
After installation, the project will be subject to detailed performance monitoring.
The monitoring program is carried out in cooperation with:
-
Passive House Institute
-
University of Innsbruck
The study will analyse real-world system performance, energy savings and long-term efficiency of the shower heat recovery installation.
Funding & Sustainability Program
The project has been submitted for support through the Tyrol Housing Subsidy Program provided by the regional government of Tyrol.
This initiative promotes energy-efficient residential construction and sustainable building technologies, supporting projects that reduce energy demand and environmental impact.
Conclusion
The project has been submitted for support through the Tyrol Housing Subsidy Program provided by the regional government of Tyrol.
This initiative promotes energy-efficient residential construction and sustainable building technologies, supporting projects that reduce energy demand and environmental impact.
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