Since 1960 Hubert has supplied several types of mechanical aerators. With the Simcar aerator and from 1973 with the HB-aerator, Hubert became one of the leading companies in mechanical surface aeration.
In 1990 Hubert developed a new type of vertical surface aerator, the Hubair®, with an efficiency between 2.0 and 3.2 kg O²/kWh.