Project Description


Clean streets, clean air. A jointly developed innovation that contributes to the improvement of the air quality in cities, in order to create a healthier work and living environment.


RAVO is part of the FAYAT group and has been a world leader in the production of street sweepers for many years. The company continuously seeks to improve its products, based on its vision to create a cleaner work and living environment for everyone. RAVO is well aware of the growing problem of urban particulate matter (fine dust) pollution and, in addition to removing dirt from the streets, strives to substantially improve air quality in cities. For doing so, RAVO found a collaborative partner in ENS.

RAVO 5 iSeries

In close collaboration with the engineering and production department of RAVO, ENS Clean Air developed a customized solution in which our air purification technology was integrated into the RAVO 5i Series. This resulted in the first and only street sweeper utilizing our proprietary fine dust elimination technology: the HYGiON. The “Berliner Stadsreinigung” in the city of Berlin was the first to use HYGiON street sweepers.

Certification by TÜV

Given the limited amount of space available in the street sweeper, it was a real challenge to integrate our positive ionization technology. Nevertheless, the result was a great succes, due to a smart and robust design. With a certification measurement, TÜV (Technischer Überwachungsverein) demonstrated that the HYGiON is capable of achieving a PM10 reduction of more than 80% and a PM2.5 reduction of more than 75%. This is a wonderful example of how a jointly developed innovation contributes to a healthier living environment.

Project details

RAVO (Fayat Group)

Urban area