Magnetic permeability shall be less than 1.2 before fabrication and not greater than 2.0 after fabrication as measured in a oersted field, tube has 60 fins per ft.
A heat transferring unit utilizing a separate source of steam or hot water as the heat transfer medium. It consists of finned parallel tubes joined together by a header or headers and is designed for installation in the ducts of a forced air circulating system. It may be provided with a flanged outer casing to facilitate mounting of the unit in planned or existing duct work. Circulation of the heated air is achieved by use of a blower or fan not integral with the heating unit.
Classification: Air heaters and hot air distributors, not electrically heated, incorporating a motor-driven fan or blower, and parts thereof, of iron or steel
NSN 6130-00-518-1884
NSN 6320-01-443-8676
NSN 5996-00-186-8709
NSN 6620-00-421-4361
NSN 5960-00-918-2369
NSN 5925-01-254-2578
NSN 5996-00-267-1139
NSN 5999-01-281-7525
NSN 5985-00-845-1962
NSN 2925-01-617-3622
NSN 6240-00-229-8183
NSN 5915-00-246-0596