Abstract: An industrial burner assembly comprising a manifold with a fuel inlet and a longitudinal axis, and a plurality of elongated burners positioned radially about the longitudinal axis having fuel ports in communication with the manifold and fuel inlet, wherein each elongated burner has an outer mixing tube, an inner mixing tube positioned coaxially within the outer mixing tube to form an annular space therebetween in communication with the fuel port, the inner mixing tube having an inner surface forming a passage for air flow through the burner assembly, and a plurality of apertures formed in the inner mixing tube to allow introduction of fuel from the annular space into the air flow passage to provide for efficient mixture of air and fuel in the burner assembly prior to combustion.