In many countries, water from the public supply network is intended to serve as drinking water for people without further treatment.
In order to be available to people in sufficient quantity and quality, it is treated, transported and stored at great expense. In addition to the costs, this also requires a lot of energy and sufficient raw water.
Treatment and transport of drinking water from the tap are costly. About 0.6 kWh of electrical energy is required per cubic meter (Towards efficient use of water resources in Europe, European Environment Agency, 2012).
The supply of rainwater from the cistern requires only 0.15 kWh for the same quantity to reach the points of consumption (WISY AspriPlus 15/3, power consumption: 600 watts, flow rate: 65 l/min).
Public water suppliers in Germany provide around 4.6 billion cubic meters of tap water of drinking water quality for households and small businesses every year (German Federal Statistical Office, 2012).
Consistent use of locally available rainwater and the associated energy savings could reduce Germany's CO₂ emissions by around half a million tons of carbon dioxide (CO₂) annually.
Or to put it briefly:
If you use rainwater, this is significantly more climate-friendly than the use of costly treated tap water.
Rainwater harvesting systems offer the potential to significantly reduce your environmental footprint through reduced water consumption.
Capturing and using rainwater makes sense for private households as well as for businesses and public institutions.
If you are interested in rainwater harvesting, we will be happy to advise you: Contact us!