Abstract: A respiratory device can include an oxygen generator and a ventilator. The oxygen generator can include a first inlet to ambient air, a vacuum or pressure swing oxygen generating system in fluid communication with the first inlet, a first fluid pathway, and a first outlet. The ventilator can include a second inlet to ambient air and a blower in fluid communication with the second inlet to draw ambient air. The ventilator can include a third inlet in fluid communication with the first fluid pathway upstream of the first outlet. The blower can also be in fluid communication with the second inlet to draw at least some of the extracted oxygen. The ventilator can also include a second outlet in fluid communication with the blower to dispense a mixture of the ambient air and the extracted oxygen to the user.

Abstract: A blower unit can include an outer housing, an inlet subassembly, a fan subassembly, an outlet subassembly, and a grommet. The outer housing can have an aperture extend along a first axis between first and second ends. The inlet subassembly can be received in the first end of the aperture. The fan subassembly can be received in the aperture adjacent to the inlet subassembly and include at least one wire. The outlet subassembly can be received in the second end. The grommet can be positioned between at least part of the second end and the outlet subassembly. The at least one wire can extend through the grommet. The grommet can seal against the at least one wire. The grommet can seal between the outer housing and the outlet subassembly.