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 5905-01-516-8932
NSN 4140-01-188-8160
NSN 5999-01-060-9164
NSN 5975-00-225-8722
NSN 6110-01-061-3523
NSN 4140-01-279-0556
NSN 5895-01-258-4382
NSN 6150-01-634-0575
NSN 5975-00-608-7006
NSN 5985-00-584-3795
NSN 5935-01-094-0129
NSN 5915-00-881-3735