These blowers have Backward Curved with radial tip impeller, which makes it ideal to handle, slightly dusty air, hence suitable for induced draft application. Such as - For Smoke / Dust etc.
The static pressure developed by these fans is mostly used on the Suction side of the Blower, hence called Induced draft.
HUMIDIN has designed three series in I. D. application in order to have flexibility and to meet complete industrial applications such as AMRL, AMRM, AHRM.

For restricted and specific applications one has to go for straight radial based impeller hence HUMIDIN offers four series of Centrifugal Blowers. These fans have low efficiency and the same is compensated by less maintenance of fans.
Such as- AMSL, AMSM, AHSM, AHSH