A blower comprising: a housing at least partially defining a chamber； and an impeller driven about a rotational axis to generate an air flow within the chamber. The impeller has a first axial end, an opposite, second axial end, and a periphery, and the impeller defines a first airflow path having a first axial inlet proximate the first axial end and open in a first axial direction and a first radial outlet extending about the periphery and open in a substantially radial direction. The impeller defines a second airflow path separate from the first airflow path, the second airflow path having a second axial inlet proximate a second axial end and open in an opposite, second axial direction and a second radial outlet extending along the periphery of the impeller in a substantially radial direction.
