A blower comprising: a housing at least partially defining a chamber having a chamber inlet and a chamber outlet, the chamber having a non-circular cross-section proximate the chamber outlet； a tube assembly in fluid communication with the chamber, the tube assembly having a tube inlet coupled to the chamber outlet and a tube outlet, the tube assembly having a non-circular cross-section proximate the tube inlet； and an impeller operable to generate an air flow within the chamber and through the tube assembly.
