Blower assembly including a noise attenuating impeller and method for assembling the same

An impeller for use with a blower assembly that includes a cutoff point, said impeller comprising;

• a plurality of blades that each include a tip portion comprising:
• a radially inner edge and an opposing radially outer edge, said radially outer edge comprising a transition point that divides said radially outer edge into a first portion and a second portion, wherein said first portion includes a shape that is complementary to at least a portion of a shape of the cutoff point;
• a first edge face including a first length defined between said radially inner edge and said first portion;
• and
• a second edge face including a second length defined between said radially inner edge and said second portion, said first length being longer than said second length.

A method of assembling a blower housing, said method comprising,

• providing a housing including an outlet and a cutoff point positioned proximate the outlet;
• and
• coupling an impeller within the housing, wherein the impeller includes a plurality of blades that each include a tip portion including a radially outer edge and a transition point that divides the radially outer edge into a first portion and a second portion, wherein coupling the impeller within the housing comprises:
• forming a first radial gap between the cutoff point and the first portion, wherein said first radial gap includes a constant width;
• and
• forming a second radial gap between the cutoff point and the second portion, wherein the second radial gap includes a width that is longer than said constant width of said first radial gap.