Abstract: A ventilator fan device including a male wheel, a female wheel and arcuate blades. The male wheel forms an end plate having an axis of rotation. The end plate includes a hub for mounting the wheel to a shaft. The female wheel forms a ring inlet for axial inlet of air. A plurality of longitudinal arcuate blades extend between and conform to the plate annular portion and the ring inlet. The blades are positioned for radial discharge of air upon rotation of about the axis. Substantially uniform robotic welds permanently affixing the blades to the end plate and the ring inlet.