The city of Zurich aims to reduce its carbon emissions to net zero by 2040. One of the most urgent and effective projects is to replace fossil fuel-powered heating systems with climate-friendly district heating. The Altstetten and Höngg energy network is making an important contribution to this. As local, renewable energy sources, ewz primarily uses waste heat from the treated wastewater and the sludge recycling facility at the Werdhölzli sewage treatment plant. Implementation in the Höngg Central supply areas will take place from 2023 to 2028, in Altstetten East from 2024 to 2030 and in Altstetten West from 2027 to 2033.
With a connection to the energy network, we supply you with 75 or 100 per cent renewable energy for heating and hot water production. In sub-regions, you also have the option of using climate-friendly cooling to cool properties.
The following variants are available:
Connection and energy supply
- Connection of your property to the district heating/cooling network
- Supply of district heating and, where available, district cooling
Preparing for the connection
- Preparing for the connection of your property to the district heating/cooling network
- Supply of district heating/cooling at a later date, e.g. when replacing a heating system
We bear the financial and technical responsibility. You pay for the volume of energy purchased and the output power.
We monitor the supply to your property around the clock. You benefit from troubleshooting free of charge.
We supply you with heating and cooling from local renewable energy sources. They meet all legal requirements.
The price is made up of three components:
- Connection price: one-off set-up costs
- Price for heating and cooling: your consumption-based energy costs
- Base price: costs for infrastructure, servicing and maintenance as well as for the 24-hour on-call service
Check whether a connection is possible at your location (in German) and find out about the respective prices.
The city and canton of Zurich subsidise connections to district heating. Find out more on the website of the City of Zurich (in German). You must submit your application for subsidies before renovating your heating system.
The link between your district heating system and your property’s heating system is the transfer station. This includes all the required technology, e.g. heat exchangers, energy meters and regulators. A calibrated meter measures and calculates the heat or cooling consumed. Find out more about the transmission line cadastre on public and private property. The layout of the lines within a property must be discussed with the property owner.
