WISY AG Germany has its company headquarters in Hitzkirchen, a small town surrounded by meadows and forest within the boundaries of the Vogelsberg nature recreation area in Hesse, Germany. The company was founded in 1989 by Norbert Winkler (WISY – Winkler Systems), who laid the foundation for the emergence of rainwater harvesting by inventing and patenting the filter collector with the unique filtration technique.

'Rainy' Dual Intensity filters work at high efficiency regardless of the intensity of rainfall and have self-cleaning abilities. At nominal prices, our filters are market leaders in Rooftop Rain Water Harvesting.

NeeRain is young start up committed to a cause of Rainwater Harvesting. Rainwater that is delivered free of cost to each one of us is going down the drains. At Neerain we offer Patent forwarded technologies to capture each drop of rainwater for day to day use or diverting to Mother Earth to fill our groundwater bank.