Ventilation unit

Abstract

A ventilation unit have a scroll defining an interior space, a blower wheel located in the interior space to be driven in rotation to draw air into the interior space to ventilate a room. The blower wheel includes a wheel hub mounted to the motor, a plurality of fan blades coupled to an upper end of the wheel hub and spaced circumferentially about the axis, and a support ring coupled to a radially-outer edge of the plurality of fan blades. The wheel hub includes a central motor mount, a peripheral blade mount ring coupled to each of the plurality of fan blades and a plurality of spokes interconnecting the central motor mount and the peripheral blade mount ring. Each of the spokes have an airfoil-shaped cross section.

Dependencies are inferred from the claim text.