Dayton discharge caps are ideal for converting a tubeaxial fan into an upblast ventilator, used for exhausting air in industrial and commercial facilities. These stack caps feature heavy-duty galvanised steel construction with two opposed blade dampers that are mounted on a vertical roof fan and protected with a wind band for maximum air exhaustion. The dampers also protect the building's interior from precipitation when fans are not operating. Choose from a wide range of these discharge caps, available in heights ranging from 26 to 65 inches.