Mobile air cleaning unit and distribution system

A mass transit vehicle comprising:

• a frame;
• a cabin mounted to the frame, the cabin including a roof and a passenger zone defining a passenger zone length;
• an air cleaning unit including an air cleaner housing mounted to the roof, an air cleaning device disposed within the housing, an inlet upstream of the air cleaning device, and an outlet downstream of the air cleaning device, the air cleaning unit operable to draw in air through the inlet, through the air cleaning device, and discharge a flow of cleaned air out of the outlet;
• a duct system disposed within the cabin and extending substantially along the passenger zone length, the duct system in fluid communication with the outlet and operable to receive the flow of cleaned air from the outlet and direct the flow of cleaned air to the cabin substantially evenly along the passenger zone length;
• and
• an air conditioning unit including an air conditioner housing separate from the air cleaner housing, an air conditioning device disposed within the air conditioning housing, an inlet upstream of the air conditioning device, and an outlet downstream of the air conditioning device, the air conditioning unit operable to draw in air through the inlet, through the air conditioning device, and discharge a flow of conditioned air out of the outlet, wherein the outlet of the air conditioning unit is in communication with the duct system to direct the flow of conditioned air to the cabin substantially evenly along the passenger zone length, and
• further wherein the duct system includes a cleaned air duct extending substantially along the passenger zone length and a conditioned air duct extending substantially along the passenger zone length, the conditioned air duct configured to convey the conditioned air separate from the conveyance of the cleaned air through the cleaned air duct, and wherein the cleaned air duct is disposed within the conditioned air duct and configured to discharge the flow of cleaned air outside the conditioned air duct into the passenger zone.