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 6240-01-627-0968
NSN 5975-01-157-9152
NSN 5920-01-085-8374
NSN 5855-01-052-7149
NSN 5910-01-423-8985
NSN 5990-00-210-2953
NSN 5999-01-277-5299
NSN 6110-00-999-3130
NSN 6240-00-116-3629
NSN 6150-00-822-1528
NSN 5975-00-442-3500
NSN 5855-01-409-1792