NOVELTY - The manifold (600) useful in a fuel cell assembly, comprises an air inlet (601) to receive the air, a fuel inlet to receive the fuel, an air outlet on a first surface of the manifold, a fuel outlet (613) on an opposite surface of the manifold, flow paths, a humidifier coupled to one of the air outlet and the air inlet, a motor constructed and arranged to power the humidifier, an air return (612) and an fuel return (603) on the surface of the manifold, and a current collector coupled to the manifold. The manifold is constructed and arranged to provide air to all cathodes.    USE - The manifold is useful in a fuel cell assembly, which is useful in a power distribution system for a load (all claimed), in many additional devices and in automobiles and recreational vehicles.    ADVANTAGE - The manifold permits a smaller footprint for the fuel cell assemblies thus providing design simplification, cost reduction, size reduction and/or improved performance to the fuel cell assemblies, and improves the operational efficiency of the fuel cell assemblies.    DETAILED DESCRIPTION - The manifold (600) useful in a fuel cell assembly, comprises an air inlet (601) to receive the air, a fuel inlet to receive the fuel, an air outlet on a first surface of the manifold, a fuel outlet (613) on an opposite surface of the manifold, flow paths, a humidifier coupled to one of the air outlet and the air inlet, a motor constructed and arranged to power the humidifier, an air return (612) and an fuel return (603) on the surface of the manifold, and a current collector coupled to the manifold. The manifold is constructed and arranged to provide air to all cathodes of a first and a second fuel cell stack, which are fluidically coupled to the manifold, and is configured to provide fuel to all anodes of the first and second fuel cell stack. The first flow path provides the air from the air inlet to the cathodes and the second flow path provides the fuel from the fuel inlet to the anodes. The current collector is electrically coupled to the first fuel cell stack. INDEPENDENT CLAIMS are included for:    (1) a fuel cell assembly;    (2) a power distribution system for a load;    (3) a method of assembling a fuel cell assembly; and    (4) a method of facilitating assembly of a fuel cell assembly.    DESCRIPTION OF DRAWING(S) - The diagram shows a perspective view of a manifold.    Manifold (600)    Air inlet (601)    Fuel return (603)    Air return (612)    Fuel outlet. (613)