Fan units characterised by the absence of the scroll, intended to be integrated in systems where space is limited and it is not possible to install the complete fan.
Typical applications are in ovens, plenums, cabins and air handling units. The impellers used are the same as the standard fans, while the performance is conditioned by the system in which they are integrated.
The constructional versions that can be supplied are: 4 and 5 for directly coupled; 9 for transmission. They can also be supplied in hot gas execution with cooling fan, with and without insulated panel, for operating temperatures in the impeller area that can reach 300°C.