Ventilation system for a passenger vehicle

A ventilating system for a passenger carrying vehicle having a passenger compartment defined by side and end walls, a ceiling and roof thereover, and a floor, a plurality of generally equally spaced doors along each of the side walls, and a plurality of generally equally spaced window units along the side walls wherein a window unit is arranged between adjacent doors, said system comprising a plenum chamber mounted along the ceiling, a plurality of equally spaced apart outside atmospheric air intake fan assemblies communicating said plenum and said outside air mounted in the ceiling having air intake openings in the roof for pumping said air from the atmosphere into the plenum chamber, said chamber having air diffuser outlets in the ceiling along opposite sides to distribute outside atmosphere air flow along substantially the entire length of the side walls, and means for exhausting air from the passenger compartment including a plurality of equally spaced apart exhaust fan assemblies mounted along the ceiling in locations intermediate adjacent intake fan assemblies and having exhaust air openings in the roof, and exhaust vents in the side walls arranged below said window units, said exhaust fan assemblies including air passage means isolating said exhaust fan assemblies from said plenum chamber, and said exhaust vents including ducts in the side walls, inlet openings at the side walls adjacent the floor communicating said ducts and the passenger compartment, and outlet openings communicating said ducts and the atmosphere and spaced above the inlet openings.

A ventilating system for a passenger carrying vehicle having a passenger compartment defined by side and end walls, a ceiling and roof thereover, and a floor, a plurality of generally equally spaced doors along each of the side walls, and a plurality of generally equally spaced window units along the side walls wherein a window unit is arranged between adjacent doors, said system comprising a plenum chamber mounted along the ceiling, a plurality of air intake fan assemblies mounted in the ceiling and equally spaced apart for pumping air from the atmosphere into the plenum chamber, said chamber having air diffuser outlets in the ceiling along opposite sides to distribute an air flow along substantially the entire length of the side walls, a plurality of exhaust fan assemblies mounted along the ceiling intermediate adjacent intake fan assemblies and equally spaced apart for exhausting air from the passenger compartment, said exhaust fan assemblies including air passage means isolated from said plenum chamber, exhaust vents in the side walls, said air intake and exhaust fan assemblies coacting to maintain a positive or above-atmospheric pressure in the passenger compartment to cause a net exhaust of air at the exhaust vents in the side walls, said exhaust vents being arranged below the window units and including ducts in the side walls, inlet openings for the ducts arranged along the floor, and outlet openings for the ducts spaced above the inlet openings.